01858nas a2200277 4500008004100000022001400041245008900055210006900144260007300213300001400286490000800300520093600308653001301244653001701257653001801274653001901292100002001311700001501331700001801346700001801364700002101382700002201403700001701425700002501442856011301467 2008 eng d a0022-309300aSilicate nanoparticles by bioleaching of glass and modification of the glass surface0 aSilicate nanoparticles by bioleaching of glass and modification  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJUL a3433-34370 v3543 a

Bioleaching is examined as a low temperature (50 degrees C) soft chemical approach to nanosynthesis and surface processing. We demonstrate that fungus based bioleaching of borosilicate glass enables synthesis of nearly monodispersed ultrafine (similar to 5 +/- 0.5 nm) silicate nanoparticles. Using various techniques such as X-ray diffraction, X-ray photoelectron spectroscopy and FTIR we compare the constitution and composition of the nanoparticles with that of the parent glass, and establish the basic similarities between the two. The bioleaching process is shown to enhance the non-bridging oxygen component and correspondingly influence the Si-O-Si network. The root mean square roughness of glass surface is seen to increase from 1.27 nm for bare glass to 2.52 nm for 15 h fungal processed case, this increase being equivalent to that for glass annealed at 500 degrees C. (c) 2008 Elsevier B.V. All rights reserved.

10aBioglass10aBiomaterials10aborosilicates10anarroparticles1 aKulkarni, Sneha1 aSyed, Asad1 aSingh, Sanjay1 aGaikwad, Anil1 aPatil, Kashinath1 aVijayamohanan, K.1 aAhmad, Absar1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/silicate-nanoparticles-bioleaching-glass-and-modification-glass-surface-001749nas a2200289 4500008004100000022001400041245012700055210006900182260007100251300001400322490000600336520071700342653002101059653002001080653003101100653002101131653001701152100001801169700001601187700002001203700002101223700001701244700002201261700001901283700002501302856013201327 2009 eng d a1944-824400aEnhanced conversion efficiency in dye-sensitized solar cells based on hydrothermally synthesized TiO2-MWCNT nanocomposites0 aEnhanced conversion efficiency in dyesensitized solar cells base a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcSEP a2030-20350 v13 a

A 50 % enhancement in the conversion efficiency (4.9-7.37 %) is realized in dye-sensitized solar cells Using hydrothermally synthesized TiO2-multiwalled carbon nanotube (MWCNT) nanocomposites as compared to hydrothermally synthesized TiO2 without MWCNT and Degussa P25. Several characterizations have been employed to reveal the nature of the modification imparted to the MWCNTs under hydrothermal processing conditions and the resulting TiO2-MWCNT conjugation through -COOH groups. Efficient charge transfer In the nanocomposite and efficient electron transport by MWCNT (significantly higher Incident-photon-to-current conversion efficiency) are suggested to be the possible reasons for the enhancement.

10aCarbon nanotubes10acharge transfer10aDye-sensitized solar cells10aHybrid composite10ahydrothermal1 aMuduli, Subas1 aLee, Wonjoo1 aDhas, Vivek, V.1 aMujawar, Sarfraj1 aDubey, Megha1 aVijayamohanan, K.1 aHan, Sung-Hwan1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/enhanced-conversion-efficiency-dye-sensitized-solar-cells-based-hydrothermally-synthesized-001669nas a2200277 4500008004100000022001400041245014200055210006900197260010600266300001200372490000800384520063900392653001101031653001801042653001801060653002301078100002001101700002601121700001601147700002201163700001601185700001401201700002001215700002501235856013101260 2009 eng d a0038-109800aManipulation of magnetic nanostructures through low temperature metal-oxygen chemistry: Co/CoO exchange biased nanodonuts and Co nanotips0 aManipulation of magnetic nanostructures through low temperature  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcFEB a277-2800 v1493 a

Dense nanodonut and nanotip type morphologies are shown to self-evolve in Ultrathin cobalt films during growth under Vacuum, depending oil the level of oxygen incorporation and temperature. The nanodonut morphology forms at room temperature and the corresponding magnetic hysteresis shows exchange bias (similar to 35 Oe shift along the field axis), which is attributed to the presence of CoO and its exchange Coupling with cobalt. The morphology evolves into nanotip features with increase of growth temperature, with Concurrent elimination of the oxide component and exchange bias. (C) 2008 Elsevier Ltd. All rights reserved.

10aCo/CoO10aMagnetic film10aself assembly10aVacuum evaporation1 aPhase, Deodatta1 aChoudhary, Ram, Janay1 aGanesan, V.1 aReddy, Raghvendra1 aGupta, Ajay1 aSelvi, N.1 aKulkarni, Sneha1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/manipulation-magnetic-nanostructures-through-low-temperature-metal-oxygen-chemistry-cocoo-001335nas a2200217 4500008004100000022001400041245005400055210005400109260007300163300001400236490000800250520064400258653000900902653001900911653002300930100002100953700001400974700001900988700002501007856008501032 2009 eng d a0378-437100aParametric dependence studies on cracking of clay0 aParametric dependence studies on cracking of clay aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcAPR a1352-13580 v3883 a

We have studied the shrinkage-crack patterns formed in the process of drying of clay/water slurries employing simple laboratory experiments. Both isotropic and directional drying was studied. The objective has been to examine the correlation between the solvent, materials parameters and the crack patterns. Attempt is made to fit the observations to specific models. The dynamics of the pattern formation process and the geometric properties of the crack patterns are found to be in conformity with the hydrodynamic model by Lee and Routh [W.P. Lee, A.F. Routh, Langmuir 20 (2004) 9887]. (C) 2008 Elsevier B.V. All rights reserved.

10aclay10aCracks pattern10aHydrodynamic model1 aPasricha, Kanika1 aWad, Uday1 aPasricha, Renu1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/parametric-dependence-studies-cracking-clay-002208nas a2200217 4500008004100000022001400041245012400055210006900179260011000248300001400358490000700372520133700379100001601716700002201732700001801754700001801772700002501790700002301815700002501838856012701863 2010 eng d a1463-907600aElucidation of the role of hexamine and other precursors in the formation of magnetite nanorods and their stoichiometry0 aElucidation of the role of hexamine and other precursors in the  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcFEB a3246-32530 v123 a

Hexamine is known to assist anisotropic growth of metal oxides and the same is also found to be true for magnetite nanosynthesis. In this work we elucidate the role of hexamine and other precursors in the formation of magnetite nanorods by the hydrothermal route and their stoichiometry. Various others hydrolyzing agents such as sodium hydroxide (NaOH), sodium hydroxide + hexamine, ammonia (NH(3)), ammonia + formaldehyde are also studied. The synthesized nanoparticles are characterized with the help of various techniques such as X-ray diffraction (XRD), FT-IR spectroscopy, UV-VIS-NIR spectroscopy, transmission electron microscopy (TEM), Mossbauer spectroscopy and SQUID magnetization measurements. It is found that only when ferric chloride, ferrous ammonium sulfate (FAS) and hexamine are used, well defined nanorods are formed. When sodium hydroxide and hexamine are used as a hydrolyzing system nearly spherical nanoparticles with small size (similar to 13 nm) are formed, as compared to the case of sodium hydroxide alone which leads to bigger cube like nanoparticles. Interestingly the decomposition products of hexamine do not lead to nanorod formation. Thus, slow decomposition of hexamine at elevated temperature and the consequent slow rise in pH is the key to the anisotropic growth of the iron oxide system.

1 aSingh, Hema1 aBhagwat, Shrikant1 aJouen, Samuel1 aLefez, Benoit1 aAthawale, Anjali, A.1 aHannoyer, Beatrice1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/elucidation-role-hexamine-and-other-precursors-formation-magnetite-nanorods-and-their-001393nas a2200241 4500008004100000022001400041245012700055210006900182260011000251300001400361490000700375520044900382100002400831700002000855700001700875700002000892700001700912700002500929700001800954700002300972700002500995856013101020 2011 eng d a1463-926200aFrom graphite oxide to highly water dispersible functionalized graphene by single step plant extract-induced deoxygenation0 aFrom graphite oxide to highly water dispersible functionalized g aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJUL a1990-19960 v133 a

We report a single step facile synthesis of highly water dispersible functionalized graphene nanosheets by plant extract-induced deoxygenation of graphite oxide (GO). The results of various characterizations reveal that the properties of such plant extract-converted graphene nanosheets (PCGN) are comparable to chemically converted graphene nanosheets (CCG). These results open a green route to the emerging graphene-based technologies.

1 aMhamane, Dattakumar1 aRamadan, Wegdan1 aFawzy, Manal1 aRana, Abhimanyu1 aDubey, Megha1 aRode, Chandrashekhar1 aLefez, Benoit1 aHannoyer, Beatrice1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/graphite-oxide-highly-water-dispersible-functionalized-graphene-single-step-plant-extract-000924nas a2200253 4500008004100000022001400041245009700055210006900152260007700221300001400298490000600312653002100318653001900339653001300358653002100371653002000392100001800412700002000430700002100450700002400471700002400495700002500519856012600544 2012 eng d a1864-563100a3D Hexaporous carbon assembled from single-layer graphene as high performance supercapacitor0 a3D Hexaporous carbon assembled from singlelayer graphene as high aBOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANYbWILEY-V C H VERLAG GMBHcOCT a2159-21640 v510aElectrochemistry10aEnergy storage10agraphene10aporous materials10aSupercapacitors1 aYadav, Prasad1 aBanerjee, Abhik1 aUnni, Sreekuttan1 aJog, Jyoti, Prakash1 aKurungot, Sreekumar1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/3d-hexaporous-carbon-assembled-single-layer-graphene-high-performance-supercapacitor-001469nas a2200181 4500008004100000022001400041245010100055210006900156260011000225300001200335490000600347520072300353100001901076700001801095700002501113700002401138856012501162 2012 eng d a2040-336400aEnhanced piezoresponse of electrospun PVDF mats with a touch of nickel chloride hexahydrate salt0 aEnhanced piezoresponse of electrospun PVDF mats with a touch of  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcFEB a752-7560 v43 a

PVDF nanofibers are prepared using electrospinning. The effect of addition of a hydrated salt, nickel chloride hexahydrate (NiCl2 center dot 6H(2)O), on the phase formation is examined. Addition of the hydrated salt (NC) is found to enhance the polar beta phase by about 30%. The peak to peak piezo-voltage generated for PVDF NC is almost 0.762 V, a factor of 3 higher than that for PVDF. The fiber mats exhibit a significantly enhanced dynamic strain sensor response. The voltage generated per unit micro-strain developed during the free vibration test for PVDF was 0.119 mV whereas it was 0.548 mV for PVDF NC, exhibiting a non-linearly enhanced performance vis a vis the increase in the beta phase component.

1 aDhakras, Dipti1 aBorkar, Vivek1 aOgale, Satishchandra1 aJog, Jyoti, Prakash uhttps://library.ncl.res.in/content/enhanced-piezoresponse-electrospun-pvdf-mats-touch-nickel-chloride-hexahydrate-salt-002136nas a2200313 4500008004100000022001400041245010700055210006900162260007400231300000800305490000700313520111700320653001401437653001201451653001701463653001601480653001001496653001201506653001701518100001601535700001501551700002101566700002001587700001601607700002401623700002501647700001901672856013101691 2012 eng d a1388-076400aQuantum dot bio-conjugate: as a western blot probe for highly sensitive detection of cellular proteins0 aQuantum dot bioconjugate as a western blot probe for highly sens aVAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDSbSPRINGERcMAR a7320 v143 a

In the present study, we report a quantum dot (QD)-tailored western blot analysis for a sensitive, rapid and flexible detection of the nuclear and cytoplasmic proteins. Highly luminescent CdTe and (CdTe) ZnS QDs are synthesized by aqueous method. High resolution transmission electron microscopy, Raman spectroscopy, fourier transform infrared spectroscopy, fluorescence spectroscopy and X-ray diffraction are used to characterize the properties of the quantum dots. The QDs are functionalized with antibodies of prostate apoptosis response-4 (Par-4), poly(ADP-ribose) polymerases and beta actin to specifically bind with the proteins localized in the nucleus and cytoplasm of the cells, respectively. The QD-conjugated antibodies are used to overcome the limitations of conventional western blot technique. The sensitivity and rapidity of protein detection in QD-based approach is very high, with detection limits up to 10 pg of protein. In addition, these labels provide the capability of enhanced identification and localization of marker proteins in intact cells by confocal laser scanning microscopy.

10aDetection10aImaging10ananomedicine10aquantum dot10aRapid10asensors10aWestern blot1 aKale, Sonia1 aKale, Anup1 aGholap, Haribhau1 aRana, Abhimanyu1 aDesai, Rama1 aBanpurkar, Arun, G.1 aOgale, Satishchandra1 aShastry, Padma uhttps://library.ncl.res.in/content/quantum-dot-bio-conjugate-western-blot-probe-highly-sensitive-detection-cellular-proteins-001819nas a2200229 4500008004100000022001400041245011000055210006900165260011000234300001200344490000700356520091600363100002601279700002201305700002601327700002001353700001901373700002101392700002101413700002501434856013001459 2013 eng d a1463-926200aFluorescent sophorolipid molecular assembly and its magnetic nanoparticle loading: a pulsed laser process0 aFluorescent sophorolipid molecular assembly and its magnetic nan aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJAN a943-9530 v153 a

We report realization of strong green fluorescence in a fully biocompatible highly spherical mesoscale molecular assembly of sophorolipid created by pulsed UV laser processing of a water-based dispersion of sophorolipid. Remarkably, the said fluorescence is totally absent in the original molecule of sophorolipid and is thus the property of the pulsed laser induced modifications in the molecule and the assembly. We have separately examined the consequences of laser irradiation for glucose and oleic acid components which form the sophorolipid. This fluorescence character appears to be driven by the oleic acid component while the assembly process is assisted by the glucose component. Importantly the laser synthesized mesostructures can be easily redispersed in an aqueous medium after being dried and can also be loaded with magnetic nanoparticles (magnetite) for inducing the hyperthermia effect.

1 aSingh, Pradeep, Kumar1 aMukherji, Ruchira1 aJoshi-Navare, Kasturi1 aBanerjee, Abhik1 aGokhale, Rohan1 aNagane, Satyawan1 aPrabhune, Asmita1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/fluorescent-sophorolipid-molecular-assembly-and-its-magnetic-nanoparticle-loading-pulsed-002597nas a2200181 4500008004100000022001400041245016000055210006900215260011000284300001200394490000600406520178200412100002302194700002702217700002402244700002502268856012202293 2014 eng d a1754-569200a3D micro-porous conducting carbon beehive by single step polymer carbonization for high performance supercapacitors: the magic of in situ porogen formation0 a3D microporous conducting carbon beehive by single step polymer  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcFEB a728-7350 v73 a

We report non-templated synthesis of interconnected microporous carbon (IMPC) sheets having beehive morphology by direct pyrolysis of poly(acrylamide-co-acrylic acid) potassium salt in inert atmosphere without any activation. The presence of the alkali metal in the selected polymer precursor results in a high specific surface area of 1327 m(2) g(-1). Importantly, 80% of the pore volume is contributed by micropores with pore size ranging from 1-2 nm which is ideal for use as an electrode for supercapacitors. Whereas the rest of the surface area was contributed by a small fraction of mesopores and macropores due to the interconnected structure. The presence of three different types of pores make the material ideal for supercapacitor electrodes. IMPC was tested as an electrode in both aqueous and non-aqueous supercapacitors. All the aqueous measurements were done in 1 M H2SO4 solution with a potential window 1 V. A specific capacitance of 258 F g(-1) was realized at a constant charge-discharge current of 0.5 A g(-1) and it maintained at a value of 150 F g(-1) at 30 A g(-1). A long cycle stability of 90% capacitance retention was observed after 5000 charge-discharge cycles at a current density of 2 A g(-1). At the highest power density 13 600 W kg(-1) the energy density was found to be 3.1 W h kg(-1). Non aqueous performance was tested in the presence of 1 M LiPF6 in ethylene carbonate-di-methyl carbonate with 5 mg active material loading. A specific capacitance of 138 F g(-1) was obtained at a current density of 0.25 A g(-1) and it retained at a value of 100 F g-1 at 10 A g(-1). The material can deliver an energy density of 31 W h kg(-1) at its highest power density of 11 000 W kg(-1) in a two electrode system based on active material loading.

1 aPuthusseri, Dhanya1 aAravindan, Vanchiappan1 aMadhavi, Srinivasan1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/3d-micro-porous-conducting-carbon-beehive-single-step-polymer-carbonization-high-001031nas a2200193 4500008004100000022001400041245007200055210006400127260011000191300001400301490000700315520030200322100002100624700002300645700002000668700002200688700002500710856010200735 2014 eng d a1359-734500aCH3NH3PbI(3-x)(BF4)(x): molecular ion substituted hybrid perovskite0 aCH3NH3PbI3xBF4x molecular ion substituted hybrid perovskite aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcSEP a9741-97440 v503 a

A molecular ion (BF4-) substituted hybrid perovskite CH3NH3PbI(3-x)(BF4)(x) is synthesized. The substituted perovskite shows significant enhancement in electrical conductivity at low frequencies and improved photoresponse under AM1.5 illumination as compared to the perovskite (CH3NH3PbI3).

1 aNagane, Satyawan1 aBansode, Umesh, P.1 aGame, Onkar, S.1 aChhatre, Shraddha1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/ch3nh3pbi3-xbf4x-molecular-ion-substituted-hybrid-perovskite-002280nas a2200241 4500008004100000022001400041245013700055210006900192260010600261300001200367490000800379520132200387653002801709653002201737653000901759653002101768100002401789700002201813700002401835700002501859700002501884856012901909 2014 eng d a0013-468600aElectronically and catalytically functional carbon cloth as a permeable and flexible counter electrode for dye sensitized solar cell0 aElectronically and catalytically functional carbon cloth as a pe aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcMAR a248-2530 v1233 a

In this work we demonstrate that a conducting carbon cloth obtained by one-step pyrolysis of easily available cellulose fabric competes favorably with the commonly employed expensive platinum/FTO system as a counter electrode for dye sensitized solar cell (DSSC). In view of the low carbonization temperature (1000 degrees C) which forbids full graphitization, the nature of carbon in this case is represented by topologically randomly assembled nanoscale graphene units (turbostratic carbon). This morphology has high density of edge states and oxygen containing surface groups rendering multitude of catalytic sites for the reduction of I-3(-). Moreover the cloth is permeable to the dye and/or liquid electrolyte and its absorption properties also help retain the electrolyte. A fairly high efficiency of 5.8% is achieved using such cloth as a counter electrode as against 7% with the conventional Pt/FTO system. Moreover, the permeable property of the cloth eliminates a complete step of drilling hard TCO substrates for final dispensing of electrolyte into the device and the sealing process is also facile. In fact even the dye can be dispensed through the cloth. Finally, the flexibility of the carbon cloth can adapt easily to flexible/wearable DSSC designs. (C) 2014 Elsevier Ltd. All rights reserved.

10aconducting carbon cloth10acounter electrode10aDSSC10awithout drilling1 aTathavadekar, Mukta1 aBiswal, Mandakini1 aAgarkar, Shruti, A.1 aGiribabu, Lingamallu1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/electronically-and-catalytically-functional-carbon-cloth-permeable-and-flexible-counter-001901nas a2200181 4500008004100000022001400041245012200055210006900177260007100246300001400317490000700331520116600338100001701504700002301521700002001544700002501564856013001589 2014 eng d a0887-062400aEnhanced capacitance retention in a supercapacitor made of carbon from sugarcane bagasse by hydrothermal pretreatment0 aEnhanced capacitance retention in a supercapacitor made of carbo a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcJUN a4233-42400 v283 a

A unique morphology-controlling protocol involving hydrothermal preprocessing before pyrolysis is presented to convert cellulosic waste in the form of sugarcane bagasse into three-dimensional (3D) interconnected, conducting, and high surface area carbon nanochannels. The large buffer spaces in such a porous carbon sample yield impressive electrochemical capacitance (C-sp) of 280 F/g at a current density of 1 A/g (and 275 F/g at 5 mV/s), with 72% retention even at a very high current density of 20 A/g. In contrast, the non-hydrothermally treated sample exhibits a C-sp value of 180 F/g at 1 A/g and only 52% retention at 20 A/g. The much better performance of the hydrothermally preprocessed bagasse-derived carbon (BHAC) can be ascribed to the solvent retention inside the buffer spaces created, negating the diffusional limitations of pore inaccessibility at higher scan rates. The BHAC has a high surface area of 1260 m(2)/g with a fairly good (11 wt %) concentration of oxygen functionality. The material renders a good energy density of Wh/kg at a power density of 3.5 kW/kg and shows good cyclability of 90% after 1000 charge/discharge cycles.

1 aWahid, Malik1 aPuthusseri, Dhanya1 aPhase, Deodatta1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/enhanced-capacitance-retention-supercapacitor-made-carbon-sugarcane-bagasse-hydrothermal-001755nas a2200277 4500008004100000022001400041245008700055210006900142260006900211300001200280490000800292520084600300653001301146653001401159653001801173653001201191653001501203653001101218100001801229700002401247700002001271700001901291700002501310700002501335856011701360 2014 eng d a0925-400500aEvaluation of n-type ternary metal oxide NiMn2O4 nanomaterial for humidity sensing0 aEvaluation of ntype ternary metal oxide NiMn2O4 nanomaterial for aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcFEB a837-8430 v1913 a

Synthesis of mono-dispersed oleic acid (OA) capped NiMn2O4 (NMO) nanoparticles and their use for humidity sensing is reported. Oleic acid capped NMO (NMO-cOA) nanoparticles are synthesized from nickel oleate and manganese oleate complex. NiMn2O4 is obtained by removing oleic acid capping at 500 degrees C in air. X-ray diffraction analysis shows formation of pure NiMn2O4 phase which is also confirmed by HRTEM-SAED analysis. The TEM analysis also shows that the nanoparticles are nearly mono-dispersed. Doctor bladed films of NMO nanoparticles are seen to exhibit excellent humidity sensing property. The resistivity is seen to change by two orders with humidity change from 11% RH to 92% RH with fairly good linearity over the entire range. The response and recovery times are also fast. (C) 2013 Elsevier B.V. All rights reserved.

10aHumidity10aImpedance10aNanoparticles10aNiMn2O410aOleic acid10aSensor1 aGawli, Yogesh1 aBadadhe, Satish, S.1 aBasu, Aniruddha1 aGuin, Debanjan1 aShelke, Manjusha, V.1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/evaluation-n-type-ternary-metal-oxide-nimn2o4-nanomaterial-humidity-sensing-001713nas a2200193 4500008004100000022001400041245013600055210006900191260011000260300001600370490000600386520089000392100002601282700001701308700002701325700002101352700002501373856012101398 2014 eng d a2046-206900aFrom micron to nano-curcumin by sophorolipid co-processing: highly enhanced bioavailability, fluorescence, and anti-cancer efficacy0 aFrom micron to nanocurcumin by sophorolipid coprocessing highly  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcNOV a60334-603410 v43 a

Co-sonication of curcumin and acidic sophorolipid in aqueous solution is shown to lead to a dramatic enhancement of curcumin bioavailability through size reduction and encapsulation. The interaction between the two is studied and discussed based on optical absorption, photoluminescence, dynamic light scattering (DLS), zeta potential, FE-SEM, TEM, Infrared spectroscopy and X-ray diffraction measurements. The cytotoxicity effects of curcumin on breast cancer cell lines, MCF-7 and MDA-MB-231, are shown to be significantly enhanced by the formation of its complex with sophorolipid. The relative cytotoxicity of curcumin with its SL(A) complex is more due to the presence of the glucose moiety. The results further suggest that sophorolipid based formulations, which solubilize and nano-encapsulate curcumin after lipid digestion, show great potential for curcumin cell entry.

1 aSingh, Pradeep, Kumar1 aWani, Kirtee1 aKaul-Ghanekar, Ruchika1 aPrabhune, Asmita1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/micron-nano-curcumin-sophorolipid-co-processing-highly-enhanced-bioavailability-201632nas a2200205 4500008004100000022001400041245012900055210006900184260000800253300001400261490000700275520086900282100002301151700002701174700002501201700002401226700002401250700002501274856012701299 2014 eng d a1613-681000aFrom waste paper basket to solid state and Li-HEC ultracapacitor electrodes: a value added journey for shredded office paper0 aFrom waste paper basket to solid state and LiHEC ultracapacitor  cNOV a4395-44020 v103 a

Hydrothermal processing followed by controlled pyrolysis of used white office paper (a globally collectable shredded paper waste) are performed to obtain high surface area carbon with hierarchical pore size distribution. The BET specific surface area of such carbon is 2341 m 2 g(-1). The interconnected macroporous structure along with the concurrent presence of mesopores and micropores makes the material ideal for ultracapacitor application. Such waste paper derived carbon (WPC) shows remarkable performance in all solid-state supercapacitor fabricated with ionic liquid-polymer gel electrolyte. At room temperature, the material exhibits a power density of 19 000 W kg(-1) with an energy capability of 31 Wh kg(-1). The Li-ion electrochemical capacitor constructed using WPC as cathode also shows an excellent energy storage capacity of 61 Wh kg(-1)

1 aPuthusseri, Dhanya1 aAravindan, Vanchiappan1 aAnothumakkool, Bihag1 aKurungot, Sreekumar1 aMadhavi, Srinivasan1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/waste-paper-basket-solid-state-and-li-hec-ultracapacitor-electrodes-value-added-journey02001nas a2200265 4500008004100000022001400041245008700055210006900142260007100211300001400282490000600296520106100302653003101363653001601394653002001410100002301430700001801453700002401471700002201495700002401517700002001541700002901561700002501590856012001615 2014 eng d a2168-048500aFunctionally engineered egg albumen gel for quasi-solid dye sensitized solar cells0 aFunctionally engineered egg albumen gel for quasisolid dye sensi a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcDEC a2707-27140 v23 a

In this report, we demonstrated an interesting application of a bioderived material for the dye sensitized solar cells (DSSCs). Egg white, the clear liquid in a hen's egg, which possesses a remarkable gelling/cross-linking ability, was applied in the form of a gel electrolyte in a DSSC architecture to enhance its durability. A hybrid gel composed of poly(acrylic acid), polyaniline and egg albumen was synthesized, and the cell efficiency, stability and durability of the corresponding DSSC device were studied in detail. The dye sensitized solar cell with the egg albumen based electrolyte demonstrated a conversion energy efficiency of 4.6%. Further, a chemically modified egg albumen with ethylenediaminetetraacetic dianhydride showed improved cross-linking, microstructural and conductivity properties of the gel, and yielded a remarkable 5.75% conversion efficiency. Electrochemical impedance spectroscopy data showed favorable characteristics for charge transport through the modified gel and supported the efficiency observations very well.

10adye sensitized solar cells10aEgg albumen10agel electrolyte1 aKelkar, Sarika, A.1 aPandey, Komal1 aAgarkar, Shruti, A.1 aSaikhedkar, Nidhi1 aTathavadekar, Mukta1 aAgrawal, Ishita1 aGundloori, Rathna, V. N.1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/functionally-engineered-egg-albumen-gel-quasi-solid-dye-sensitized-solar-cells-002050nas a2200193 4500008004100000022001400041245011700055210006900172260011000241300001600351490000700367520124200374100001901616700001801635700002201653700002401675700002501699856013201724 2014 eng d a1463-907600aHigh performance all-organic flexural piezo-FET and nanogenerator via nanoscale soft-interface strain modulation0 aHigh performance allorganic flexural piezoFET and nanogenerator  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcSEP a22874-228810 v163 a

Flexural strain fields are encountered in a wide variety of situations and invite novel device designs for their effective use in sensing, actuating, as well as energy harvesting (nanogenerator) applications. In this work we demonstrate an interesting all-organic device design comprising an electrospun P(VDF-TrFE) fiber-mat built directly on a conducting PANI film, which is also grown on a flexible PET substrate, for flexural piezo-FET and nanogenerator applications. Orders of magnitude stronger modulation of electrical transport in PANI film is realized in this device as compared to the case of a similar device but with a uniform spin-coated P(VDF-TrFE) film. We find that in the flexural mode of operation, the interaction between the laterally modulated nanoscale strain field distributions created by the fibers and the applied coherent strain field strongly influences the carrier transport in PANI. The transport modulation is suggested to occur due to strain-induced conformational changes in P(VDF-TrFE) leading to changes in carrier localization-delocalization. We further show that the fiber-mat based device system also works as an efficient nanogenerator capable of delivering power for low power applications.

1 aDhakras, Dipti1 aGawli, Yogesh1 aChhatre, Shraddha1 aWadgaonkar, Prakash1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/high-performance-all-organic-flexural-piezo-fet-and-nanogenerator-nanoscale-soft-interface-001888nas a2200265 4500008004100000022001400041245008700055210006900142260007100211300001600282490000600298520096500304653003001269653002301299653002001322653001701342653002001359653001701379100002001396700002101416700002601437700001801463700002501481856011601506 2014 eng d a1944-824400aHollow Co0.85Se nanowire array on carbon fiber paper for high rate pseudocapacitor0 aHollow Co085Se nanowire array on carbon fiber paper for high rat a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcNOV a18844-188520 v63 a

A supercapacitor electrode is fabricated with Co0.85Se hollow nanowires (HNW) array, which is synthesized by wet chemical hydrothermal selenization of initially grown cobalt hydroxyl carbonate nanowires on conductive CFP. The dense self-organized morphology of Co0.85Se HNWs is revealed by scanning/transmission electron microscopy. The as-synthesized Co0.85Se HNWs possess high pseudocapacitive property with high capacitance retention and high durability. The areal capacitance value is seen to vary from 929.5 to 600 mF cm(-2) (60% retention) as the current density is increased from 1 to 15 mA cm(-2), an increase of a factor of 15. Based on mass loading, this corresponds to a very high gravimetric capacitance of 674 (for 2 mA cm(-2) or 1.48 Ag-1) and 444 Fg(1-) (for 15 mA cm(-2) or 11 A g(-1)) in a full-cell configuration with the Co0.85Se HNWs as cathode and activated carbon as anode (asymmetric configuration) promising results are obtained.

10aasymmetric supercapacitor10acarbon fiber paper10acobalt selenide10ahydrothermal10apseudocapacitor10aselenization1 aBanerjee, Abhik1 aBhatnagar, Sumit1 aUpadhyay, Kush, Kumar1 aYadav, Prasad1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/hollow-co085se-nanowire-array-carbon-fiber-paper-high-rate-pseudocapacitor-001682nas a2200229 4500008004100000022001400041245010200055210006900157260000900226300001200235490000800247520087300255653001901128653004501147653001601192653001801208100002301226700002701249700002401276700002501300856012701325 2014 eng d a0013-468600aImproving the energy density of Li-ion capacitors using polymer-derived porous carbons as cathode0 aImproving the energy density of Liion capacitors using polymerde cJUN  a766-7700 v1303 a

High energy density Li-ion hybrid electrochemical capacitors (Li-HEC) are fabricated with 3 D architectured high surface area porous carbon (HSPC) derived from the poly(acrylamide-co-acrylic acid) potassium salt in a single step without any activating agent. The obtained HSPC exhibits high specific surface area of 1490 m(2) g(-1) and characterized with several analytical techniques. Li-HEC is fabricated with insertion type Li4Ti5O12 anode by adjusting the mass balance based on the single electrode performance with Li. The Li-HEC delivered the maximum energy density of similar to 55 Wh kg(-1), which is much higher than commercially available activated carbon (similar to 36 Wh kg(-1)). Further HSPC based Li-HEC delivered excellent cycleability and rendered similar to 87% of initial value after 2000 cycles. (C) 2014 Elsevier Ltd. All rights reserved.

10aenergy density10aLi-ion hybrid electrochemical capacitors10anon-aqueous10aporous carbon1 aPuthusseri, Dhanya1 aAravindan, Vanchiappan1 aMadhavi, Srinivasan1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/improving-energy-density-li-ion-capacitors-using-polymer-derived-porous-carbons-cathode01896nas a2200265 4500008004100000022001400041245012500055210006900180260010600249300001200355490000800367520090000375653001001275653002201285653001601307653001901323100002201342700002401364700002101388700001901409700002701428700002501455700002401480856012601504 2014 eng d a0013-468600aIndanthrone derived disordered graphitic carbon as promising insertion anode for sodium ion battery with long cycle life0 aIndanthrone derived disordered graphitic carbon as promising ins aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcNOV a218-2230 v1463 a

We report facile, one step synthesis of disordered graphitic carbon by high temperature (1000 degrees C) pyrolysis of indanthrone dye (ID). The pyrolysed carbon is disordered in nature and the same is clearly evidenced by various analytical techniques like X-ray diffraction, Raman spectroscopy and high resolution transmission electron microscopy. Na-insertion properties of such indanthrone dye derived disordered graphitic carbon (IDDGC) is evaluated in half-cell assembly (Na/IDDGC). The test cell delivered a reversible capacity of similar to 160 mAh g(-1) at current density of 25 mAg 1. In addition, excellent cycling profiles are noted for such IDDGC, which retains 67% of initial reversible capacity after 500 cycles. The present study clearly highlights the importance of disorder in the graphitic carbon for efficient Na-ion storage. (C) 2014 Elsevier Ltd. All rights reserved.

10aanode10adisordered carbon10aindanthrone10aNa-ion battery1 aSuryawanshi, Anil1 aMhamane, Dattakumar1 aNagane, Satyawan1 aPatil, Shankar1 aAravindan, Vanchiappan1 aOgale, Satishchandra1 aSrinivasan, Madhavi uhttps://library.ncl.res.in/content/indanthrone-derived-disordered-graphitic-carbon-promising-insertion-anode-sodium-ion-001250nas a2200217 4500008004100000022001400041245016800055210006900223260000800292300001600300490000600316520043000322100002200752700002200774700002400796700001900820700001900839700001900858700002500877856013000902 2014 eng d a2040-336400aLarge scale synthesis of graphene quantum dots (GQDs) from waste biomass and their use as an efficient and selective photoluminescence on-off-on probe for Ag+ ions0 aLarge scale synthesis of graphene quantum dots GQDs from waste b cMAR a11664-116700 v63 a

Graphene quantum dots (GQDs) are synthesized from bio-waste and are further modified to produce amine-terminated GQDs (Am-GQDs) which have higher dispersibility and photoluminescence intensity than those of GQDs. A strong fluorescence quenching of Am-GQDs (switch-off) is observed for a number of metal ions, but only for the Ag+ ions is the original fluorescence regenerated (switch-on) upon addition of L-cysteine.

1 aSuryawanshi, Anil1 aBiswal, Mandakini1 aMhamane, Dattakumar1 aGokhale, Rohan1 aPatil, Shankar1 aGuin, Debanjan1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/large-scale-synthesis-graphene-quantum-dots-gqds-waste-biomass-and-their-use-efficient-and02059nas a2200181 4500008004100000022001400041245013600055210006900191260000800260300001400268490000600282520138500288100001801673700001901691700002201710700002501732856012001757 2014 eng d a2050-748800aLow temperature grown CuBi2O4 with flower morphology and its composite with CuO nanosheets for photoelectrochemical water splitting0 aLow temperature grown CuBi2O4 with flower morphology and its com cMAR a3661-36680 v23 a

In this work we highlight a peculiar synthesis protocol for the p-type ternary metal oxide system of copper bismuth oxide (CuBi2O4), which yields a highly crystalline spherulitic morphology at a low temperature of 78 degrees C. We associate this growth with the hydrogen bonding effects imparted by the ethanol-water co-solvent system used for the synthesis. We present a detailed growth mechanism by evaluating different synthesis conditions systematically. Furthermore we show that upon the use of the non-stoichiometric (excess copper) precursor mixture under the same experimental conditions the growth of spherulitic CuBi2O4 changes the size and type of the spherulites. Interestingly, careful optimization of the nonstoichiometric synthesis presents a complete impediment to the spherulitic growth and produces a composite of nanorods of CuBi2O4 and nanosheets of CuO. This anisotropic nanocomposite shows an order of magnitude higher surface area as compared to spherulitic CuBi2O4. Since both CuBi2O4 and CuO are visible light absorbing p-type semiconductors, when the synthesized nanocomposite materials are examined as photoelectrochemical (PEC) photocathodes for water splitting, they show a remarkable dependence on the morphology and phase constitution. Almost 13-fold stronger PEC response is observed as the morphology changes from spherulites to nanorods.

1 aPatil, Rupali1 aKelkar, Sarika1 aNaphadeab, Rounak1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/low-temperature-grown-cubi2o4-flower-morphology-and-its-composite-cuo-nanosheets01978nas a2200205 4500008004100000022001400041245019300055210006900248260011000317300001400427490000600441520105100447100002001498700002601518700002301544700002701567700002401594700002501618856012901643 2014 eng d a2040-336400aMOF-derived crumpled-sheet-assembled perforated carbon cuboids as highly effective cathode active materials for ultra-high energy density Li-ion hybrid electrochemical capacitors (Li-HECs)0 aMOFderived crumpledsheetassembled perforated carbon cuboids as h aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcFEB a4387-43940 v63 a

Lithium ion hybrid capacitors (Li-HECs) have attracted significant attention for use in next generation advanced energy storage technologies to satisfy the demand of both high power density as well as energy density. Herein we demonstrate the use of very high surface area 3D carbon cuboids synthesized from a metal-organic framework (MOF) as a cathode material with Li4Ti5O12 as the anode for high performance Li-HECs. The energy density of the cell is similar to 65 W h kg(-1) which is significantly higher than that achievable with commercially available activated carbon (similar to 36 W h kg(-1)) and a symmetric supercapacitor based on the same MOF-derived carbon (MOF-DC similar to 20 W h kg(-1)). The MOF-DC/Li4Ti5O12 Li-HEC assembly also shows good cyclic performance with similar to 82% of the initial value (similar to 25 W h kg(-1)) retained after 10 000 galvanostatic cycles under high rate cyclic conditions. This result clearly indicates that MOF-DC is a very promising candidate for future P-HEVs in a Li-HEC configuration.

1 aBanerjee, Abhik1 aUpadhyay, Kush, Kumar1 aPuthusseri, Dhanya1 aAravindan, Vanchiappan1 aMadhavi, Srinivasan1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/mof-derived-crumpled-sheet-assembled-perforated-carbon-cuboids-highly-effective-cathode-001693nas a2200193 4500008004100000022001400041245015300055210006900208260011000277300001600387490000600403520084100409100002401250700002401274700002001298700002401318700002501342856013201367 2014 eng d a2046-206900aNanophase CulnS(2) nanosheets/CuS composite grown by the SILAR method leads to high performance as a counter electrode in dye sensitized solar cells0 aNanophase CulnS2 nanosheetsCuS composite grown by the SILAR meth aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcMAY a21989-219960 v43 a

Single phase CulnS(2) (CIS) nanosheets are synthesized on TiO2 coated FTO by the simple technique of Successive Ionic Layer Adsorption Reaction (SILAR) followed by annealing at 500 degrees C. Annealing at a lower temperature of 250 degrees C is found to yield CuS nanoparticles in addition to the CIS phase. Both single phase CIS and the CuS/CIS nanocomposite were examined as counter electrodes for a dye-sensitized solar cell (DSSC). The CIS-CuS composite is found to have a synergistic effect on the catalytic performance toward the reduction of tri-iodide, yielding a power conversion efficiency of 6.3% as compared to pristine CIS (5%) or CuS (3.5%). The possible reasons behind the high performance of the composite are elucidated using cyclic voltammetry (CV) measurements and electrochemical impedance spectroscopy (EIS).

1 aBhosale, Reshma, K.1 aAgarkar, Shruti, A.1 aAgrawal, Ishita1 aNaphade, Rounak, A.1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/nanophase-culns2-nanosheetscus-composite-grown-silar-method-leads-high-performance-counter-001814nas a2200217 4500008004100000022001400041245012500055210006900180260010600249300001200355490000700367520095400374100001901328700002701347700001801374700001801392700002001410700002401430700002501454856011701479 2014 eng d a0008-622300aOligomer-salt derived 3D, heavily nitrogen doped, porous carbon for Li-ion hybrid electrochemical capacitors application0 aOligomersalt derived 3D heavily nitrogen doped porous carbon for aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcDEC a462-4710 v803 a

3D high surface area porous carbon is seen to form via self assembly of porous graphene sheets by direct pyrolysis of an oligomer salt tailored for the realization of molecular level activation. The oligomer salt was derived from 4-amino benzoic acid as the monomer by a facile free radical polymerization process. Incorporation of the functional groups (-COONa) eliminate the need for any external activating agents (KOH, ZnCl2, etc.) and also render high degree of sub-nanoscale homogeneity. This oligomer derived carbon (ODC) exhibits efficient performance in non-aqueous charge storage application namely Li-ion hybrid electrochemical capacitor (Li-HEC) owing to its high surface area, 3D interconnectivity and an appropriate pore size distribution. The Li-HEC fabricated with ODC based electrodes delivered a maximum energy density of similar to 63 Wh kg(-1) with spinel L4Ti5O12 as the anode. (C) 2014 Elsevier Ltd. All rights reserved.

1 aGokhale, Rohan1 aAravindan, Vanchiappan1 aYadav, Prasad1 aJain, Srashti1 aPhase, Deodatta1 aMadhavi, Srinivasan1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/oligomer-salt-derived-3d-heavily-nitrogen-doped-porous-carbon-li-ion-hybrid-002054nas a2200181 4500008004100000022001400041245013200055210006900187260011000256300001200366490000600378520127400384100002201658700002301680700002001703700002501723856012401748 2014 eng d a2050-748800aOrthorhombic/cubic Cd2SnO4 nanojunctions: enhancing solar water splitting efficiency by the suppression of charge recombination0 aOrthorhombiccubic Cd2SnO4 nanojunctions enhancing solar water sp aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcNOV a492-4990 v23 a

The low practical efficiency of binary metal oxide semiconductor-based photo-electrochemical (PEC) water splitting has prompted researchers to examine ternary and quaternary oxides, which provide more leverage for engineering the desired PEC properties via stoichiometry (valence) and phase control. One ternary system of interest in this context is cadmium tin oxide (Cd2SnO4), which supports the cubic and orthorhombic phases with optical, electronic and catalytic properties that are favourable for PEC water splitting. However, its practical PEC performance is limited by high surface recombination of the photogenerated charge carriers. In this work we circumvent this problem by engineering the constitution of Cd2SnO4 nanoparticles to a biphasic nanojunction form, comprising of a nanocomposite of cubic and orthorhombic phases. The favourable conduction band alignment between the cubic and orthorhombic phases leads to a dramatic reduction in the recombination of the photogenerated charges, leading to a 10-fold increase (from 250 mu A cm(2) to over 2 mA cm(2)) in the photocurrent vis-a-vis the single cubic or orthorhombic phase performance. We discuss the underlying mechanism for the observed dramatic enhancement in the water splitting efficiency.

1 aDeshpande, Aparna1 aKelkar, Sarika, A.1 aRayalu, Sadhana1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/orthorhombiccubic-cd2sno4-nanojunctions-enhancing-solar-water-splitting-efficiency-002068nas a2200193 4500008004100000022001400041245010300055210006900158260000800227300001200235490000600247520137700253100002401630700002401654700001901678700002001697700002501717856013201742 2014 eng d a2050-748800aPlasmonic light harvesting of dye sensitized solar cells by Au-nanoparticle loaded TiO2 nanofibers0 aPlasmonic light harvesting of dye sensitized solar cells by Auna cFEB a975-9840 v23 a

We report a significant enhancement in the performance of dye sensitized solar cells by using in situ Au nanoparticle (Au NP) loaded TiO2 nanofibers (Au: TiO2 NFs) as the light harvesting (LH) layer as compared to the use of only TiO2 nanofibers (NFs) as the LH layer. The Au NP: TiO2 nanofibers are prepared by electro-spinning of a precursor mixture whereby nanostructured porous TiO2 nanofibers are formed and get in situ loaded with only 4-5 nm AuNPs. The as-synthesized nanofibers are characterized by X-ray diffraction, Raman, photoluminescence (PL) and Mott-Schottky analyses. The presence of gold nanoparticles shows considerable improvements in light harvesting and the electrochemical properties of TiO2 nanofibers. A remarkable enhancement in the efficiency by 25% is achieved with the AuNF LH layer as compared to 12% with the NF layer, over the value without any light harvesting layer. The IPCE and impedance analyses reveal commensurate improvements. The impedance study shows a decrease in the transport resistance (R-TiO2) and an increment in the chemical capacitance and life time of the solar cell. Systematic analyses of the optical properties suggest that the enhanced light harvesting by Au NP loaded TiO2 nanofibers is caused by the role of plasmon-polariton modes at the distributed nanoscale Schottky junctions in the Au: TiO2 nanofibers.

1 aNaphade, Rounak, A.1 aTathavadekar, Mukta1 aJog, Jyoti, P.1 aAgarkar, Shruti1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/plasmonic-light-harvesting-dye-sensitized-solar-cells-au-nanoparticle-loaded-tio2-nanofibers01894nas a2200241 4500008004100000022001400041245009000055210006900145260007700214300001400291490000700305520103300312100002001345700001601365700002501381700001401406700002001420700002001440700002201460700002501482700002401507856012101531 2014 eng d a1616-301X00aScaling behavior of resistive switching in epitaxial bismuth ferrite heterostructures0 aScaling behavior of resistive switching in epitaxial bismuth fer aBOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANYbWILEY-V C H VERLAG GMBHcJUL a3962-39690 v243 a

Resistive switching (RS) of (001) epitaxial multiferroic BiFeO3/La0.67Sr0.33MnO3/SrTiO3 heterostructures is investigated for varying lengths scales in both the thickness and lateral directions. Macroscale current-voltage analyses in conjunction with local conduction atomic force microscopy (CAFM) reveal that whilst both the local and global resistive states are strongly driven by polarization direction, the type of conduction mechanism is different for each distinct thickness regime. Electrode-area dependent studies confirm the RS is dominated by an interface mechanism and not by filamentary formation. Furthermore, CAFM maps allow deconvolution of the roles played by domains and domain walls during the RS process. It is shown that the net polarization direction, and not domain walls, controls the conduction process. An interface mechanism based on barrier height and width alteration due to polarization reversal is proposed, and the role of electronic reconstruction at the interface is further investigated.

1 aRana, Abhimanyu1 aLu, Haidong1 aBogle, Kashinath, A.1 aZhang, Qi1 aVasudevan, Rama1 aThakare, Vishal1 aGruverman, Alexei1 aOgale, Satishchandra1 aValanoor, Nagarajan uhttps://library.ncl.res.in/content/scaling-behavior-resistive-switching-epitaxial-bismuth-ferrite-heterostructures-001433nas a2200205 4500008004100000022001400041245012600055210006900181260011000250300001600360490000600376520058500382100001900967700002000986700002401006700002201030700002601052700002501078856012401103 2014 eng d a2046-206900aSurfactant free gram scale synthesis of mesoporous Ni(OH)(2)-r-GO nanocomposite for high rate pseudocapacitor application0 aSurfactant free gram scale synthesis of mesoporous NiOH2rGO nano aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcAUG a39875-398830 v43 a

We report a single-step surfactant-free gram scale hydrothermal synthesis of mesoporous Ni(OH)(2) nanoparticles and the Ni(OH)(2)-reduced graphene oxide (Ni(OH)(2)-r-GO) nanocomposite. Interesting morphological features are noted. These nanomaterials are examined and compared as cathode materials for pseudo-capacitor application through detailed characterizations. A high specific capacitance (C-s) of 1538 F g(-1) is observed for Ni(OH)(2)-r-GO even at a high current density of 40 A g(-1), whereas at the same current rate, bare Ni(OH)(2) shows C-s of only 936 F g(-1).

1 aSingh, Upendra1 aBanerjee, Abhik1 aMhamane, Dattakumar1 aSuryawanshi, Anil1 aUpadhyay, Kush, Kumar1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/surfactant-free-gram-scale-synthesis-mesoporous-nioh2-r-go-nanocomposite-high-rate-002023nas a2200193 4500008004100000022001400041245017300055210006900228260011000297300001400407490000700421520115700428100001901585700002501604700002301629700002401652700002501676856012801701 2014 eng d a1463-907600aSynthesis of an efficient heteroatom-doped carbon electro-catalyst for oxygen reduction reaction by pyrolysis of protein-rich pulse flour cooked with SiO2 nanoparticles0 aSynthesis of an efficient heteroatomdoped carbon electrocatalyst aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJAN a4251-42590 v163 a

Development of a highly durable, fuel-tolerant, metal-free electro-catalyst for oxygen reduction reaction (ORR) is essential for robust and cost-effective Anion Exchange Membrane Fuel Cells (AEMFCs). Herein, we report the development of a nitrogen-doped (N-doped) hierarchically porous carbon-based efficient ORR electrocatalyst from protein-rich pulses. The process involves 3D silica nanoparticle templating of the pulse flour(s) followed by their double pyrolysis. The detailed experiments are performed on gram flour (derived from chickpeas) without any in situ/ex situ addition of dopants. The N-doped porous carbon thus generated shows remarkable electrocatalytic activity towards ORR in the alkaline medium. The oxygen reduction on this material follows the desired 4-electron transfer mechanism involving the direct reduction pathway. Additionally, the synthesized carbon catalyst also exhibits good electrochemical stability and fuel tolerance. The results are also obtained and compared with the case of soybean flour having higher nitrogen content to highlight the significance of different parameters in the ORR catalyst performance.

1 aGokhale, Rohan1 aUnni, SreeKuttan, M.1 aPuthusseri, Dhanya1 aKurungot, Sreekumar1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/synthesis-efficient-heteroatom-doped-carbon-electro-catalyst-oxygen-reduction-reaction-002258nas a2200229 4500008004100000022001400041245010600055210006900161260011000230300001400340490000600354520135600360100001401716700002401730700002201754700002201776700001901798700002501817700002501842700002901867856013201896 2014 eng d a2044-475300aTriple nanocomposites of CoMn2O4, Co3O4 and reduced graphene oxide for oxidation of aromatic alcohols0 aTriple nanocomposites of CoMn2O4 Co3O4 and reduced graphene oxid aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcMAY a1771-17780 v43 a

A composite of reduced graphene oxide (RGO) with oxides of manganese and cobalt together was prepared by a solvothermal method. During synthesis, both the reduction of graphene oxide as well as the growth of nanorod shaped CoMn2O4 and Co3O4 occurred simultaneously having a crystallite size of similar to 8 nm calculated from X-ray diffraction (XRD). The as-obtained triple nanocomposite material designated as RGO-MnCoO exhibited excellent activity for the liquid phase aerobic oxidation of aromatic alcohols under base-free conditions selectively giving the corresponding aldehydes (>85%). RGO loading was varied in the range of 1-10%, among which 1% RGO-MnCoO showed maximum catalytic activity enhancement of 24% as compared to the bare mixed oxide (MnCo-MO) for the oxidation of vanillyl alcohol. HR-TEM of RGO-MnCoO revealed that it was a composite material having uniform nanotubes of similar to 25 nm length and 6 nm diameter with a fringe pattern showing the (103) and (004) planes and lattice spaces of 0.26 nm and 0.22 nm, respectively, for the spinel CoMn2O4. The detailed studies on the morphology, size and composition of the as-prepared RGO-MnCoO nanocomposite by XRD, XPS, N-2-adsorption/desorption and O-2-TPD techniques were used to understand the role of RGO in the enhancement of catalytic activity for oxidation reaction.

1 aJha, Ajay1 aMhamane, Dattakumar1 aSuryawanshi, Anil1 aJoshi, Sameer, M.1 aShaikh, Parvez1 aBiradar, Narayan, S.1 aOgale, Satishchandra1 aRode, Chandrashekhar, V. uhttps://library.ncl.res.in/content/triple-nanocomposites-comn2o4-co3o4-and-reduced-graphene-oxide-oxidation-aromatic-alcohols-002231nas a2200241 4500008004100000022001400041245013600055210006900191260000800260300001200268490000600280520141600286653001101702653001701713653001301730653002201743653001701765100002201782700002201804700001901826700002501845856011901870 2014 eng d a1864-563100aWater electrolysis with a conducting carbon cloth: subthreshold hydrogen generation and superthreshold carbon quantum dot formation0 aWater electrolysis with a conducting carbon cloth subthreshold h cMAR a883-8890 v73 a

A conducting carbon cloth, which has an interesting turbostratic microstructure and functional groups that are distinctly different from other ordered forms of carbon, such as graphite, graphene, and carbon nanotubes, was synthesized by a simple one-step pyrolysis of cellulose fabric. This turbostratic disorder and surface chemical functionalities had interesting consequences for water splitting and hydrogen generation when such a cloth was used as an electrode in the alkaline electrolysis process. Importantly, this work also gives a new twist to carbon-assisted electrolysis. During electrolysis, the active sites in the carbon cloth allow slow oxidation of its surface to transform the surface groups from COH to COOH and so forth at a voltage as low as 0.2V in a two-electrode system, along with platinum as the cathode, instead of 1.23V (plus overpotential), which is required for platinum, steel, or even graphite anodes. The quantity of subthreshold hydrogen evolved was 24mLcm(-2)h(-1) at 1V. Interestingly, at a superthreshold potential (>1.23V+overpotential), another remarkable phenomenon was found. At such voltages, along with the high rate and quantity of hydrogen evolution, rapid exfoliation of the tiny nanoscale (5-7nm) units of carbon quantum dots (CQDs) are found in copious amounts due to an enhanced oxidation rate. These CQDs show bright-blue fluorescence under UV light.

10aCarbon10aelectrolysis10aHydrogen10aphotoluminescence10aquantum dots1 aBiswal, Mandakini1 aDeshpande, Aparna1 aKelkar, Sarika1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/water-electrolysis-conducting-carbon-cloth-subthreshold-hydrogen-generation-and02341nas a2200193 4500008004100000022001400041245010800055210006900163260000800232300001200240490000600252520166800258100001601926700001901942700001801961700002001979700002501999856012302024 2014 eng d a2040-336400aZnO(N)-Spiro-MeOTAD hybrid photodiode: an efficient self-powered fast-response UV (visible) photosensor0 aZnONSpiroMeOTAD hybrid photodiode an efficient selfpowered fastr cFEB a503-5130 v63 a

Organic-inorganic hybrid photo-detectors with a self-sufficient mode of operation represent a research area of great current interest. In most efficient photodetectors and optoelectronic devices compound semiconductors containing toxic elements such as Cd, As, Te, S, Se etc. are used and these are also expensive. Hence there is also a rapidly growing interest in replacing these with environmentally friendly and earth-abundant materials. Herein, we report a facile solution-processed fabrication of a self-powered organic-inorganic hybrid photodetector using n-type oriented ZnO nanorods and p-type Spiro-MeOTAD semiconductor. ZnO is eco-friendly and earth-abundant, and Spiro-MeOTAD is nonhazardous. We show that the latter has far less toxicity than the toxic elements stated above. This visible blind UV photodetector shows high sensitivity (10(2)) and a UV/visible rejection ratio of 300. It also exhibits fast response times of tau(rise) similar to 200 mu s and tau(fall) similar to 950 mu s. Importantly, with a small modification of nitrogen incorporation in ZnO one can also realize a highly-sensitive self-powered visible light photodetector with at least 1000% (or higher) improvements in quality factors (photocurrent/sensitivity/response time) as compared to previously reported organic-inorganic hybrid photo-detectors based on metal-chalcogenides (CdS-PANI or CuInSe2-P3HT). Interestingly, the broadband sensitivity of such N:ZnO-Spiro-MeOTAD photodiode enables sensing of low intensity (similar to 28 mu W cm(-2)) ambient white light with a high photocurrent density of 120 nA cm(-2) making it an efficient ambient white light detector.

1 aGame, Onkar1 aSingh, Upendra1 aKumari, Tanya1 aBanpurkar, Arun1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/znon-spiro-meotad-hybrid-photodiode-efficient-self-powered-fast-response-uv-visible00829nas a2200181 4500008004100000022001400041245016000055210006900215260011000284300001000394490000600404100002600410700001700436700002700453700002100480700002500501856012100526 2015 eng d a2046-206900aFrom micron to nano-curcumin by sophorolipid co-processing: highly enhanced bioavailability, fluorescence, and anti-cancer efficacy (vol 4, pg 60334, 2014)0 aFrom micron to nanocurcumin by sophorolipid coprocessing highly  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcFEB a220750 v51 aSingh, Pradeep, Kumar1 aWani, Kirtee1 aKaul-Ghanekar, Ruchika1 aPrabhune, Asmita1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/micron-nano-curcumin-sophorolipid-co-processing-highly-enhanced-bioavailability-101550nas a2200193 4500008004100000022001400041245011200055210006900167260007100236300001400307490000800321520078500329100002301114700002001137700002001157700002401177700002501201856013001226 2015 eng d a1932-744700aHybrid perovskite films by a new variant of pulsed excimer laser deposition: a room-temperature dry process0 aHybrid perovskite films by a new variant of pulsed excimer laser a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcAPR a9177-91850 v1193 a

A new variant of the classic pulsed laser deposition (PLD) process is introduced as a room-temperature dry process for the growth and stoichiometry control of hybrid perovskite films through the use of nonstoichiometric single target ablation and off-axis growth. Mixed halide hybrid perovskite films nominally represented by CH(3)NH(3)PbI(3-x)A(x) (A = Cl or F) are also grown and are shown to reveal interesting trends in the optical properties and photoresponse. Growth of good quality lead-free CH3NH3SnI3 films is also demonstrated, and the corresponding optical properties are presented. Finally, perovskite solar cells fabricated at room temperature (which makes the process adaptable to flexible substrates) are shown to yield a conversion efficiency of about 7.7%.

1 aBansode, Umesh, P.1 aNaphade, Rounak1 aGame, Onkar, S.1 aAgarkar, Shruti, A.1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/hybrid-perovskite-films-new-variant-pulsed-excimer-laser-deposition-room-temperature-dry-001869nas a2200289 4500008004100000022001400041245009900055210006900154260007100223300001600294490000600310520085500316653001901171653002401190653002401214653001201238653002201250653003401272653001801306100002001324700002301344700001601367700002101383700002201404700002501426856012801451 2015 eng d a1944-824400aNiS1.97: a new efficient water oxidation catalyst for photoelectrochemical hydrogen generation0 aNiS197 a new efficient water oxidation catalyst for photoelectro a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcSEP a20053-200600 v73 a

NiS1.97, a sulfur-deficient dichalcogenide, in nanoscale form, is shown to be a unique and efficient photoelectrochemical (PEC) catalyst for H-2 generation by water splitting. Phase pure NiS1.97 nanomaterial is obtained by converting nickel oxide into sulfide by controlled sulfurization method, which is otherwise difficult to establish. The defect states (sulfur vacancies) in this material increase the carrier density and in turn lead to favorable band line-up with respect to redox potential of water, rendering it to be an effective photoelectrochemical catalyst. The material exhibits a remarkable PEC performance of 1.25 mA/cm(2) vs NHE at 0.68 V in neutral pH, which is almost 1000 times superior as compared with that of the stoichiometric phase of NiS2. The latter is well-known to be a cocatalyst but not as a primary PEC catalyst.

10adichlacogenide10aFaradaic efficiency10aHydrogen generation10aNiS1.9710anonstoichiometric10aphotoelectrochemical catalyst10asulfurization1 aBhosale, Reshma1 aKelkar, Sarika, A.1 aParte, Golu1 aFernandes, Rohan1 aKothari, Dushyant1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/nis197-new-efficient-water-oxidation-catalyst-photoelectrochemical-hydrogen-generation-001648nas a2200277 4500008004100000022001400041245004400055210004300099260007100142300001600213490000600229520081300235653001701048653001201065653002101077653001801098653002801116653002101144100001801165700002101183700002001204700002001224700002501244700002001269856008101289 2015 eng d a1944-824400ap-type NiO hybrid visible photodetector0 aptype NiO hybrid visible photodetector a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcDEC a27597-276010 v73 a

A novel hybrid visible-light photodetector was created using a planar p-type inorganic NiO layer in a junction with an organic electron acceptor layer. The effect of different oxygen pressures on formation of the NiO layer by pulsed laser deposition shows that higher pressure increases the charge carrier density of the film and lowers the dark current in the device. The addition of a monolayer of small molecules containing conjugated pi systems and carboxyl groups at the device interface was also investigated and with correct alignment of the energy levels improves the device performance with respect to the quantum efficiency, responsivity, and photogeneration. The thickness of the Organic layer was also optimized for the device, giving a responsivity of 1.54 X 10(-2) A W-1 in 460 nm light.

10anickel oxide10aorganic10aoxygen vacancies10aphotodetector10apulsed laser deposition10asurface modifier1 aMallows, John1 aPlanells, Miguel1 aThakare, Vishal1 aBhosale, Reshma1 aOgale, Satishchandra1 aRobertson, Neil uhttps://library.ncl.res.in/content/p-type-nio-hybrid-visible-photodetector-001311nas a2200169 4500008004100000022001400041245013600055210006900191260006700260300001400327490000700341520059200348100002600940700002100966700002500987856012901012 2015 eng d a0031-865500aPulsed laser-driven molecular self-assembly of cephalexin: aggregation-induced fluorescence and its utility as a mercury ion sensor0 aPulsed laserdriven molecular selfassembly of cephalexin aggregat a111 RIVER ST, HOBOKEN 07030-5774, NJ USAbWILEY-BLACKWELLcNOV a1340-13470 v913 a

A fluorescent self-assembly of cephalexin is obtained by pulsed laser irradiation process. An intense fluorescence emission is found in the self-assembled form due to occurrence of a typical aggregation-induced emission in cephalexin molecules. It is observed that fluorescence quenching of the self-assembled fluorescent nanostructures occurs in the presence of extremely low Hg++ ions concentrations (10(-7) M) as compared to other heavy metal ions e.g. Ferrous (Fe++), Manganese (Mn++), Magnesium (Mg++), Cobalt (Co++), Nickel (Ni++) and Zinc (Zn++) at the same concentrations.

1 aSingh, Pradeep, Kumar1 aPrabhune, Asmita1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/pulsed-laser-driven-molecular-self-assembly-cephalexin-aggregation-induced-fluorescence-002444nas a2200205 4500008004100000022001400041245016900055210006900224260011000293300001600403490000700419520155700426100002401983700001802007700002502025700001802050700002502068700001702093856012802110 2015 eng d a1463-907600aSingle-layer graphene-assembled 3D porous carbon composites with PVA and Fe3O4 nano-fillers: an interface-mediated superior dielectric and EMI shielding performance0 aSinglelayer grapheneassembled 3D porous carbon composites with P aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJUN a18353-183630 v173 a

In this study, a novel composite of Fe3O4 nanofiller-decorated single-layer graphene-assembled porous carbon (SLGAPC) with polyvinyl alcohol (PVA) having flexibility and a density of 0.75 g cm(-3) is explored for its dielectric and electromagnetic interference (EMI) response properties. The composite is prepared by the solution casting method and its constituents are optimized as 15 wt% SLGAPC and 20 wt% Fe3O4 through a novel solvent relaxation nuclear magnetic resonance experiment. The PVA-SLGAPC-Fe3O4 composite shows high dielectric permittivity in the range of 1 Hz-10 MHz, enhanced by a factor of 4 as compared to that of the PVA-SLGAPC composite, with a reduced loss by a factor of 2. The temperature dependent dielectric properties reveal the activation energy behaviour with reference to the glass transition temperature (80 degrees C) of PVA. The dielectric hysteresis with the temperature cycle reveals a remnant polarization. The enhanced dielectric properties are suggested to be the result of improvement in the localized polarization of the integrated interface system (Maxwell-Wagner-Sillars (MWS) polarization) formed by the uniform adsorption of Fe3O4 on the surface of SLGAPC conjugated with PVA. The EMI shielding property of the composite with a low thickness of 0.3 mm in the X-band (8.2-12.4 GHz) shows a very impressive shielding efficiency of similar to 15 dB and a specific shielding effectiveness of 20 dB (g cm(-3))(-1), indicating the promising character of this material for flexible EMI shielding applications.

1 aRao, B., V. Bhaskar1 aYadav, Prasad1 aAepuru, Radhamanohar1 aPanda, H., S.1 aOgale, Satishchandra1 aKale, S., N. uhttps://library.ncl.res.in/content/single-layer-graphene-assembled-3d-porous-carbon-composites-pva-and-fe3o4-nano-fillers-001816nas a2200241 4500008004100000022001400041245011500055210006900170260007500239300001200314490000600326520092300332653001701255653001901272653001301291653002601304653001901330100002301349700002701372700002401399700002501423856012601448 2016 eng d a2194-428800a3D interconnected porous graphene sheets loaded with cobalt oxide nanoparticles for lithium-ion battery anodes0 a3D interconnected porous graphene sheets loaded with cobalt oxid aPOSTFACH 101161, 69451 WEINHEIM, GERMANYbWILEY-V C H VERLAG GMBHcJUL a816-8220 v43 a

Nanomaterials with high surface-to-volume ratio and tunable electronic and optical properties have expanded their use in variety of applications, especially energy conversion and storage. Here we report on the synthesis of a cobalt oxide (Co3O4)/3D-interconnected porous graphene (PG) nanocomposite by using a simple solvothermal route and its application as a Li-ion battery anode. Among the different compositions investigated, the composite PG-600 (with 50% PG) showed a discharge capacity of 700mAhg(-1) at a current density of 500mAg(-1) and maintained 90% retention after 80cycles. The high surface area of the 3DPG sheets helps the Co3O4 nanoparticles to form a uniform dispersion on the surfaces. The increased surface area (accessibility) and electrical conductivity of the composite result in significant enhancement in the capacity, cycling stability, and rate capability than the native Co3O4 phase.

10aCobalt oxide10aEnergy storage10agraphene10alithium-ion batteries10aNanocomposites1 aPuthusseri, Dhanya1 aAravindan, Vanchiappan1 aMadhavi, Srinivasan1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/3d-interconnected-porous-graphene-sheets-loaded-cobalt-oxide-nanoparticles-lithium-ion00795nas a2200205 4500008004100000245014100041210006900182260000800251300002200259490000600281100001800287700002000305700001900325700002000344700001900364700002800383700002100411700002500432856013200457 2016 eng d00a3D Polyaniline architecture by concurrent inorganic and organic acid doping for superior and robust high rate supercapacitor performance0 a3D Polyaniline architecture by concurrent inorganic and organic  cFEB aArticle No. 210020 v61 aGawli, Yogesh1 aBanerjee, Abhik1 aDhakras, Dipti1 aDeo, Meenal, S.1 aBulani, Dinesh1 aWadgaonkar, Prakash, P.1 aShelke, Manjusha1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/3d-polyaniline-architecture-concurrent-inorganic-and-organic-acid-doping-superior-and-robust01853nas a2200193 4500008004100000022001400041245010900055210006900164260006700233300001200300490000600312520111000318100001801428700002001446700002201466700002001488700002501508856012601533 2016 eng d a2196-735000aHighly stable laser-scribed flexible planar microsupercapacitor using mushroom derived carbon electrodes0 aHighly stable laserscribed flexible planar microsupercapacitor u a111 RIVER ST, HOBOKEN 07030-5774, NJ USAbWILEY-BLACKWELLcJUN a16000570 v33 a

A report is presented on the fabrication of all solid-state interdigitated flexible microsupercapacitor using ultrafast and highly scalable laser scribing technique, using highly mesoporous carbon synthesized from biomass (mushroom) with hydrothermal preprocessing. The specific protocol used for carbon synthesis renders some unique property features to the material (surface area of 2604 m(2) g(-1) with hierarchical pore size distribution) in the context of supercapacitor electrode application. A polyvinyl alcohol (PVA)-H2SO4 gel electrolyte is used for electrochemical measurements. The microsupercapacitor shows high cyclic stability up to 15000 cycles. Moreover it shows nearly 90% stability after 1000 bending cycles at 60 degrees angle. It also retains its performance even under 120 degrees bending condition. This work represents a facile and fast technique for microscaled device fabrication that can be easily commercialized. Moreover, the mushroom-derived carbon used to make the electrodes holds great promise in context of the stability and flexibility of flexible supercapacitors.

1 aYadav, Poonam1 aBasu, Aniruddha1 aSuryawanshi, Anil1 aGame, Onkar, S.1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/highly-stable-laser-scribed-flexible-planar-microsupercapacitor-using-mushroom-derived01644nas a2200145 4500008004100000245014500041210006900186260000800255300002800263490000600291520102500297100001901322700002501341856013201366 2016 eng d00aHigh-performance organic-inorganic hybrid piezo-nanogenerator via interface enhancedpolarization effects for self-powered electronic systems0 aHighperformance organicinorganic hybrid piezonanogenerator via i cOCT aArticle Number: 16004920 v33 aAn electrospun fi ber based wearable organic-inorganic hybrid piezonanogenerator compose of suitably engineered P(VDF-TrFE) and BaTiO3 nanostructures is reported. In the case of the device with an electrospun mat of piezoelectric beta-phase P(VDF-TrFE) and BaTiO3 nanoparticulates fi lled in the interfi ber open spaces, a power density of 16 mu W cm(-2) is realized at an applied impact of 0.02 MPa (which essentially corresponds to the thumb pressure). A similar device, with BaTiO 3 additionally embedded in the P(VDF-TrFE) fi bers during their formation, renders a signifi cantly higher peak power density of 28 mu W cm(-2) with instantaneous power density of approximate to 8.8 mu W cm(-2) at the same touch pressure. This performance is attributed to the high density of interfaces in such a device and the corresponding enhancement in the dielectric response. It is demonstrated that the power generated from such a hybrid device structure can be used for small scale applications such as charging a mobile phone.1 aDhakras, Dipti1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/high-performance-organic-inorganic-hybrid-piezo-nanogenerator-interface-enhancedpolarization01849nas a2200313 4500008004100000022001400041245012200055210006900177260007100246300001200317490000600329520075600335653002901091653003501120653001901155653001701174653001501191653001501206653001701221100002001238700002101258700001901279700002101298700002201319700001901341700002301360700002501383856012701408 2016 eng d a1944-824400aHybrid perovskite quantum nanostructures synthesized by electrospray antisolvent-solvent extraction and intercalation0 aHybrid perovskite quantum nanostructures synthesized by electros a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcJAN a854-8610 v83 a

Perovskites based on organometal lead halides have attracted great deal of scientific attention recently in the context of solar cells and optoelectronic devices due to their unique and tunable electronic and optical properties. Herein, we show that the use of electrospray technique in conjunction with the antisolventsolvent extraction leads to novel low-dimensional quantum structures (especially 2-D nanosheets) of CH3NH3PbI3- and CH3NH3PbBr3-based layered perovskites with unusual luminescence properties. We also show that the optical bandgaps and emission characteristics of these colloidal nanomaterials can be tuned over a broad range of visible spectral region by compositional tailoring of mixed-halide (I- and Br-based) perovskites.

10a2D nanostructure systems10aantisolvent-solvent extraction10abandgap tuning10aelectrospray10ananosheets10aperovskite10aquantum dots1 aNaphade, Rounak1 aNagane, Satyawan1 aShanker, Shiva1 aFernandes, Rohan1 aKothari, Dushyant1 aZhou, Yuanyuan1 aPadture, Nitin, P.1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/hybrid-perovskite-quantum-nanostructures-synthesized-electrospray-antisolvent-solvent-001516nas a2200193 4500008004100000245011400041210006900155260000800224300001200232490000800244520081900252100002001071700001801091700002101109700002201130700002201152700002501174856012301199 2016 eng d00aMinute-made activated porous carbon from agro-waste for Li-ion battery anode using a low power microwave oven0 aMinutemade activated porous carbon from agrowaste for Liion batt cSEP a535-5440 v2123 aWe demonstrate a very simple, cost-effective and superfast process for making Li-ion battery (LIB) anode grade carbon from agro-waste in the form of sugarcane bagasse using a low power microwave system. Activation of this bagasse derived carbon is carefully optimized by using various weight ratios of KOH to obtain the desired properties of functional carbon in terms of porosity and electrical conductivity. Low equivalent series resistance (ESR), low charge transfer resistance with good electrical conductivity, and optimum porosity for efficient ion diffusion make this carbon a good candidate for Li-ion battery anode material rendering a reversible capacity of 757 mAhg (1) at a current density of 100 mAg (1) and a good cycling performance at high current rates. (C) 2016 Elsevier Ltd. All rights reserved.1 aAgarkar, Shruti1 aYadav, Poonam1 aFernandes, Rohan1 aKothari, Dushyant1 aSuryawanshi, Anil1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/minute-made-activated-porous-carbon-agro-waste-li-ion-battery-anode-using-low-power02279nas a2200361 4500008004100000022001400041245009100055210006900146260000800215490000600223520110800229653001501337653002901352653001601381653005301397653001901450653002401469653003501493653000701528653002601535653001601561100002401577700002701601700002101628700002101649700001801670700002201688700001701710700002301727700002301750700002501773856011901798 2017 eng d a2050-748800aLow-dimensional hybrid perovskites as high performance anodes for alkali-ion batteries0 aLowdimensional hybrid perovskites as high performance anodes for cSEP0 v53 a

State-of-the-art Li (or Na) ion batteries work by insertion/extraction of the alkali metal ions into a porous electrode material, where the overall capacity is strongly dependent on the accessibility of the host material interior to the ions. On the other hand, the performance stability depends on various factors governed by the specific constitution of the electrode. Here we show that molecularly engineered low-dimensional hybrid perovskites can work as excellent anode materials for alkali-ion batteries. We measure a high reversible capacity of 646 mA h g(-1) at 100 mA g(-1) with good stability tested up to 250 cycles for the benzidine mediated lead iodide based 1D system. An ex situ analysis of the electrodes reveals that the storage primarily occurs via the Li-x(or Na-x)Pb alloying/de-alloying process. We anticipate that these results open a new direction for the use of low-dimensional hybrid perovskites for energy storage applications.

10aGeneration10aInorganic-Organic Hybrid10aLead Iodide10alithiation-intramolecular electrophilic reaction10aNa-Air Battery10aNegative Electrodes10aOrganometal Halide perovskites10aPB10aSequential Deposition10aSolar-cells1 aTathavadekar, Mukta1 aKrishnamurthy, Shrreya1 aBanerjee, Aparna1 aNagane, Satyawan1 aGawli, Yogesh1 aSuryawanshi, Anil1 aBhat, Suresh1 aPuthusseri, Dhanya1 aMohite, Aditya, D.1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/low-dimensional-hybrid-perovskites-high-performance-anodes-alkali-ion-batteries01874nas a2200181 4500008004100000245011400041210006900155260000800224300001400232490000600246520121400252100001701466700001801483700001701501700002301518700002501541856012601566 2017 eng d00aNanotubular hard carbon derived from renewable natural seed gel for high performance sodium-ion battery anode0 aNanotubular hard carbon derived from renewable natural seed gel  cAUG a6909-69150 v23 a

Electrical energy storage devices such as batteries and supercapacitors are perhaps the most researched topic today in view of its critical implications for the successful implementations of various renewable energy harvesting initiatives. Amongst the various battery systems being currently examined, the Li-battery continues to be a main player, but the Na-ion battery has been attracting significant attention lately due to the concerns about the limited reserves and high cost of Li. Hard carbon is recognized to be a good anode material for Na-battery. In this work we present a novel approach to synthesize such hard carbon from a natural gel derived from the commonly used Basil seeds (Osimum Basilicum) which swell 30 times their weight by absorbing water. The hard carbon obtained by pyrolysis of the freeze-dried mucilage possesses sheet-like and tubular morphology with decorated surface defects attributed to the presence of oxygen functionalities. This hard carbon shows a good reversible capacity of 195 mAh g(-1) at 0.1A g(-1) with an impressive approximate to 91% retention of initial capacity after 300 cycles and sustains high current densities with not much change in capacity value.

1 aSharma, Neha1 aGawli, Yogesh1 aAhmad, Absar1 aMuhammed, Musthafa1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/nanotubular-hard-carbon-derived-renewable-natural-seed-gel-high-performance-sodium-ion01830nas a2200205 4500008004100000245016600041210007000207260000800277300001200285490000700297520103000304100002101334700001701355700002001372700002201392700002401414700002501438700002801463856013301491 2017 eng d00aPhenothiazine-based D-A-π-A dyes for highly efficient dye sensitized solar cells: effect of internal acceptor and non-conjugated π-spacer on device performance0 aPhenothiazinebased DAπA dyes for highly efficient dye sensitized cFEB a280-2860 v823 aThree new D-A-pi-A metal-free organic dyes based on phenothiazine as a donor (D) and non-conjugated pi-spacer were designed and synthesized. The incorporation of different 'internal acceptors' (electron traps) such as benzothiadiazole (BTD), benzotriazole (BTA), and pyridine were shown to allow systematic tuning of the energy levels and the photophysical properties. The AI-1 dye showed lower electronic disorder compared with the other two dyes. The efficiencies achieved with AI-1, AI-2, and AI-3 dyes were 8.5% (J(sc) = 15.42 mA cm(-2), V-oc = 0.78 V, FF = 68%), 7% (J(sc) = 12.8 mA cm(-2), V-oc = 0.78 V, FF = 68%) and 6.7% (J(sc) = 11.57 mA cm(-2), V-oc = 0.82 V, FF = 68.26 %), respectively. The incorporation of non-conjugated phenothiazine as a p-spacer in D-A-pi-A dyes showed remarkable enhancement in the photovoltaic performance of dye-sensitized solar cell (DSSC) devices. The sealed DSSC devices with iodide/tri-iodide (I-/I-3(-) @)based liquid electrolyte showed promising stability under ambient conditions.1 aNagane, Satyawan1 aIchake, Amol1 aAgrawal, Ishita1 aSadhanala, Aditya1 aFriend, Richard, H.1 aOgale, Satishchandra1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/phenothiazine-based-d-%CF%80-dyes-highly-efficient-dye-sensitized-solar-cells-effect-internal01468nas a2200193 4500008004100000245010200041210006900143260000800212300001400220490000700234520077400241100002001015700002101035700001901056700002401075700002201099700002501121856012801146 2017 eng d00aSynthetic manipulation of hybrid perovskite systems in search of new and enhanced functionalities0 aSynthetic manipulation of hybrid perovskite systems in search of cOCT a3722-37390 v103 aOver the past few years the organic-inorganic hybrid perovskite systems have emerged as a promising class of materials for photovoltaic and electroluminescent thin-film device applications, in view of their unique set of tunable optoelectronic properties. Importantly, these materials can be easily solution-processed at low temperatures and as such are amenable to facile molecular engineering. Thus, a variety of low-dimensional forms and quantum structures of these materials can be obtained through strategic synthetic manipulations through small molecule incorporation or molecular ion doping. In this Minireview, we specifically focus on these approaches and outline the possibilities of utilizing these for enhanced functionalities and newer application domains.1 aNaphade, Rounak1 aNagane, Satyawan1 aBansode, Umesh1 aTathavadekar, Mukta1 aSadhanala, Aditya1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/synthetic-manipulation-hybrid-perovskite-systems-search-new-and-enhanced-functionalities01817nas a2200181 4500008004100000245012100041210006900162260000800231300001400239490000700253520114300260100002001403700001901423700002101442700001801463700002501481856012901506 2018 eng d00aG-C3N4/NiAl-LDH 2D/2D hybrid heterojunction for high-performance photocatalytic reduction ofco2 into renewable fuels0 aGC3N4NiAlLDH 2D2D hybrid heterojunction for highperformance phot cJAN a2667-26780 v103 a2D/2D interface heterostructures of g-C3N4 and NiAl-LDH are synthesized utilizing strong electrostatic interactions between positively charged 2D NiAl-LDH sheets and negatively charged 2D g-C3N4 nanosheets. This new 2D/2D interface heterojunction showed remarkable performance for photocatalytic CO, reduction to produce renewable fuels such as CO and H-2 under visible-light irradiation, far superior to that of either single phase g-C3N4 or NiAl-LDH nanosheets. The enhancement of photocatalytic activity could be attributed mainly to the excellent interfacial contact at the heterojunction of gC(3)N(4)/NiAl-LDH, which subsequently results in suppressed recombination, and improved transfer and separation of photogenerated charge carriers. In addition, the optimal g-C3N4/NiAl-LDH nanocomposite possessed high photostability after successive experimental runs with no obvious change in the production of CO from CO, reduction. Our findings regarding the design, fabrication and photophysical properties of 2D/2D heterostructure systems may find use in other photocatalytic applications including H-2 production and water purification.1 aTonda, Surendar1 aKumar, Santosh1 aBhardwaj, Monika1 aYadav, Poonam1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/g-c3n4nial-ldh-2d2d-hybrid-heterojunction-high-performance-photocatalytic-reduction-ofco202343nas a2200217 4500008004100000245013000041210006900171260000800240300002800248490000600276520153100282100002101813700001801834700002201852700002601874700002301900700001801923700002501941700003001966856012901996 2018 eng d00aHigh and reversible lithium ion storage in self-exfoliated triazole-triformyl phloroglucinol-basedcovalent organic nanosheets0 aHigh and reversible lithium ion storage in selfexfoliated triazo cMAR aArticle Number: 17021700 v83 aCovalent organic framework (COF) can grow into self-exfoliated nanosheets. Their graphene/graphite resembling microtexture and nanostructure suits electrochemical applications. Here, covalent organic nanosheets (CON) with nanopores lined with triazole and phloroglucinol units, neither of which binds lithium strongly, and its potential as an anode in Li-ion battery are presented. Their fibrous texture enables facile amalgamation as a coin-cell anode, which exhibits exceptionally high specific capacity of approximate to 720 mA h g(-1) (@100 mA g(-1)). Its capacity is retained even after 1000 cycles. Increasing the current density from 100 mA g(-1) to 1 A g(-1) causes the specific capacity to drop only by 20%, which is the lowest among all high-performing anodic COFs. The majority of the lithium insertion follows an ultrafast diffusion-controlled intercalation (diffusion coefficient, D-Li(+) = 5.48 x 10(-11) cm(2) s(-1)). The absence of strong Li-framework bonds in the density functional theory (DFT) optimized structure supports this reversible intercalation. The discrete monomer of the CON shows a specific capacity of only 140 mA h g(-1) @50 mA g(-1) and no sign of lithium intercalation reveals the crucial role played by the polymeric structure of the CON in this intercalation-assisted conductivity. The potentials mapped using DFT suggest a substantial electronic driving-force for the lithium intercalation. The findings underscore the potential of the designer CON as anode material for Li-ion batteries.1 aHaldar, Sattwick1 aRoy, Kingshuk1 aNandi, Shyamapada1 aChakraborty, Debanjan1 aPuthusseri, Dhanya1 aGawli, Yogesh1 aOgale, Satishchandra1 aVaidhyanathan, Ramanathan uhttps://library.ncl.res.in/content/high-and-reversible-lithium-ion-storage-self-exfoliated-triazole-triformyl-phloroglucinol02284nas a2200265 4500008004100000022001400041245012300055210006900178260000900247300001400256490000700270520141500277653000901692653001801701653001001719653001901729653001601748653001301764100002001777700001801797700003601815700001901851700002501870856012301895 2019 eng d a1944-824400aDirect Z-scheme g-C3N4/FeWO4 nanocomposite for enhanced and selective photocatalytic CO2 reduction under visible light0 aDirect Zscheme gC3N4FeWO4 nanocomposite for enhanced and selecti cFEB  a6174-61830 v113 a

Photocatalytic reduction of CO2 to renewable solar fuels is considered to be a promising strategy to simultaneously solve both global warming and energy crises. However, development of a superior photocatalytic system with high product selectivity for CO2 reduction under solar light is the prime requisite. Herein, a series of nature-inspired Z-scheme g C3N4/FeWO4 composites are prepared for higher performance and selective CO2 reduction to CO as solar fuel under solar light. The novel direct Z-scheme coupling of the visible light-active FeWO4 nanoparticles with C3N4 nanosheets is seen to exhibit excellent performance for CO production with a rate of 6 mu mol/g/h at an ambient temperature, almost 6 times higher compared to pristine C3N4 and 15 times higher than pristine FeWO4. More importantly, selectivity for CO is 100% over other carbon products from CO, reduction and more than 90% over. H-2 products from water splitting. Our results clearly demonstrate that the staggered band structure between FeWO4 and C3N4 reflecting the nature-inspired Z-scheme system not only favors superior spatial separation of the electron hole pair in g-C3N4/FeWO4 but also shows good reusability. The present work provides unprecedented insights for constructing the direct Z-scheme by mimicking the nature for high performance and selective photocatalytic CO2 reduction into solar fuels under solar light.

10aC3N410aCO2 reduction10aFeWO410aPhotocatalysis10asolar fuels10aZ-scheme1 aBhosale, Reshma1 aJain, Srashti1 aVinod, Chathakudath, Prabhakara1 aKumar, Santosh1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/direct-z-scheme-g-c3n4fewo4-nanocomposite-enhanced-and-selective-photocatalytic-co202395nas a2200301 4500008004100000022001400041245013200055210006900187260000800256300001200264490000800276520136300284653001501647653002201662653001901684653003401703653003401737653002901771100001801800700001801818700001801836700001901854700001901873700001401892700003001906700002501936856013201961 2020 eng d a0008-622300aRoom temperature processed in-situ carbon-coated vanadium carbide (VC@C) as a high capacity robust Li/Na battery anode material0 aRoom temperature processed insitu carboncoated vanadium carbide  cMAY a108-1160 v1613 a

3D carbide systems with their robust physical and mechanical properties have always attracted multiple application interests. In this report, we have synthesized a three-dimensional in-situ carbon coated cubic carbide, Vanadium Carbide (VC@C), by a very simple, scalable and cost-effective room temperature mechano-chemical ball-milling procedure and researched its promise as effective anode material for Li and Na ion batteries. We have demonstrated that VC@C shows an impressive initial discharge/lithiation capacity of 1165 mAh g(-1) with a high reversible capacity of 640 mAh g(-1) after 100 charge-discharge cycles at an applied current density of 0.1 A g(-1). We have also found that this material renders a very promising rate performance with significantly low capacity drop after exposing it to variable current densities ranging from 0.05 A g(-1) to 2 A g(-1) with an excellent stability up to 1000 cycles owing to its structural robustness, as verified by post-cycling characterizations. A Li-ion full cell study using LiCoO2 as cathode also showed excellent promise in terms of practical application demonstrating a reversible capacity of 95 mAh g(-1) after 100 cycles. Even for Na insertion/de-insertion VC@C shows a clear promise in terms of capacity, cyclic stability and rate performance. (C) 2020 Elsevier Ltd. All rights reserved.

10a3D carbide10aIn-situ synthesis10aLi-ion battery10aPost cycling characterization10aRoom temperature ball milling10aWilliamson-Hall analysis1 aMahajan, Mani1 aRoy, Kingshuk1 aParmar, Swati1 aSingla, Gourav1 aPandey, O., P.1 aSingh, K.1 aVaidhyanathan, Ramanathan1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/room-temperature-processed-situ-carbon-coated-vanadium-carbide-vcc-high-capacity-robust-lina02140nas a2200313 4500008004100000022001400041245013500055210006900190260000900259300001600268490000700284520108400291653001901375653004001394653002201434653001901456653001601475100001701491700002501508700001401533700001801547700001601565700002001581700003101601700002301632700002301655700002501678856012301703 2021 eng d a1433-785100aOrganic-inorganic perovskitoid with zwitterion cysteamine linker and its crystal-crystal transformation to ruddlesden-popper phase0 aOrganicinorganic perovskitoid with zwitterion cysteamine linker  cAUG  a18750-187600 v603 aWe demonstrate synthesis of a new low-D hybrid perovskitoid (a perovskite-like hybrid halide structure, yellow crystals, P21/n space group) using zwitterion cysteamine (2-aminoethanethiol) linker, and its remarkable molecular diffusion-controlled crystal-to-crystal transformation to Ruddlesden-Popper phase (Red crystals, Pnma space group). Our stable intermediate perovskitoid distinctly differs from all previous reports by way of a unique staggered arrangement of holes in the puckered 2D configuration with a face-sharing connection between the corrugated-1D double chains. The PL intensity for the yellow phase is 5 orders higher as compared to the red phase and the corresponding average lifetime is also fairly long (143 ns). First principles DFT calculations conform very well with the experimental band gap data. We demonstrate applicability of the new perovskitoid yellow phase as an excellent active layer in a self-powered photodetector and for selective detection of Ni2+ via On-Off-On photoluminescence (PL) based on its composite with few-layer black phosphorous.10aCrystal growth10aorganic-inorganic hybrid composites10aperovskite phases10aphotodetectors10azwitterions1 aKour, Prachi1 aReddy, Mallu, Chenna1 aPal, Shiv1 aSidhik, Siraj1 aDas, Tisita1 aPandey, Padmini1 aMukherjee, Shatabdi, Porel1 aChakraborty, Sudip1 aMohite, Aditya, D.1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/organic-inorganic-perovskitoid-zwitterion-cysteamine-linker-and-its-crystal-crystal02456nas a2200301 4500008004100000022001400041245016000055210006900215260000900284300001600293490000700309520139100316653003101707653003201738653002601770653002801796653002401824653002101848100001701869700002301886700002001909700002901929700001901958700000501977700002201982700002502004856012502029 2021 eng d a1944-824400aResistive switching in HfO2-x/La0.67Sr0.33MnO3 heterostructures: an intriguing case of low H-field susceptibility of an E-field controlled active interface0 aResistive switching in HfO2xLa067Sr033MnO3 heterostructures an i cNOV  a54133-541420 v133 aHigh-performance nonvolatile resistive random access memories (ReRAMs) and their small stimuli control are of immense interest for high-speed computation and big-data processing in the emerging Internet of Things (IoT) arena. Here, we examine the resistive switching (RS) behavior in growth-controlled HfO2/La0.67Sr0.33MnO3 (LSMO) heterostructures and their tunability in a low magnetic field. It is demonstrated that oxygen-deficient HfO2 films show bipolar switching with a high on/off ratio, stable retention, as well as good endurance owing to the orthorhombic-rich phase constitution and charge (de)trapping-enabled Schottky-type conduction. Most importantly, we have demonstrated that RS can be tuned by a very low externally applied magnetic field (similar to 0-30 mT). Remarkably, application of a magnetic field of 30 mT causes RS to be fully quenched and frozen in the high resistive state (HRS) even after the removal of the magnetic field. However, the quenched state could be resurrected by applying a higher bias voltage than the one for initial switching. This is argued to be a consequence of the electronically and ionically ``active'' nature of the HfO2-x/LSMO interface on both sides and its susceptibility to the electric and low magnetic field effects. This result could pave the way for new designs of interface-engineered high-performance oxitronic ReRAM devices.10acharge trapping-detrapping10alow external magnetic field10aoxide-oxide interface10apulsed laser deposition10aresistive switching10aSchottky barrier1 aAntad, Vivek1 aShaikh, Parvez, A.1 aBiswas, Abhijit1 aRajput, Shatruhan, Singh1 aDeo, Shrinivas1 a1 aPatil, Shivprasad1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/resistive-switching-hfo2-xla067sr033mno3-heterostructures-intriguing-case-low-h-field03170nas a2200301 4500008004100000022001400041245013900055210006900194260000800263300001600271490000700287520214300294653001302437653003002450653002902480653001402509653003002523653003302553100001902586700001802605700001802623700002502641700001702666700001602683700002502699700002002724856012402744 2023 eng d a1944-824400aMitigating dendrite formation on a Zn electrode in aqueous zinc chloride by the competitive surface chemistry of an imidazole additive0 aMitigating dendrite formation on a Zn electrode in aqueous zinc  cMAY a23093-231030 v153 a

Electrochemical energy storage systems are critical in several ways for a smooth transition from nonrenewable to renewable energy sources. Zn-based batteries are one of the promising alternatives to the existing state-of-the-art Li-ion battery technology, since Li-ion batteries pose significant drawbacks in terms of safety and cost-effectiveness. Zn (with a reduction potential of -0.76 V vs SHE) has a significantly higher theoretical volumetric capacity (5851 mAh/cm3) than Li (2061 mAh/cm3), and it is certainly far less expensive, safer, and more earth-abundant. The formation of dendrites, hydrogen evolution, and the formation of a ZnO passivation layer on the Zn anode are the primary challenges in the development and deployment of rechargeable zinc batteries. In this work, we examine the role of imidazole as an electrolyte additive in 2 M ZnCl2 to prevent dendrite formation during zinc electrodeposition via experimental (kinetics and imaging) and theoretical density functional theory (DFT) studies. To characterize the efficacy and to identify the appropriate concentration of imidazole, linear sweep voltammetry (LSV) and chronoamperometry (CA) are performed with in situ monitoring of the electrodeposited zinc. The addition of 0.025 wt % imidazole to 2 M ZnCl2 increases the cycle life of Zn-symmetric cells cycled at 1 mA/cm2 for 60 min of plating and stripping dramatically from 90 to 240 h. A higher value of the nucleation overpotential is noted in the presence of imidazole, which suggests that imidazole is adsorbed at a competitively faster rate on the surface of zinc, thereby suppressing the zinc electrodeposition kinetics and the formation. X-ray tomography reveals that a short circuit caused by dendrite formation is the main plausible failure mechanism of Zn symmetric cells. It is observed that the electrodeposition of zinc is more homogeneous in the presence of imidazole, and its presence in the electrolyte also inhibits the production of a passivating coating (ZnO) on the Zn surface, thereby preventing corrosion. DFT calculations conform well with the stated experimental observations.

10adendrite10aDensity functional theory10aexchange current density10aImidazole10aX-ray computed tomography10azinc metal electrodeposition1 aRana, Ashutosh1 aThakare, Anup1 aKumar, Nikhil1 aMukherjee, Buddhadev1 aTorris, Arun1 aDas, Bidisa1 aOgale, Satishchandra1 aBanerjee, Abhik uhttps://library.ncl.res.in/content/mitigating-dendrite-formation-zn-electrode-aqueous-zinc-chloride-competitive-surface02199nas a2200313 4500008004100000022001400041245010900055210006900164260000900233300001100242490000600253520118600259653000801445653001801453653001901471653001101490653003201501100001801533700001901551700002801570700002301598700001901621700003401640700002001674700001601694700002101710700002501731856012901756 2024 eng d a2515-765500aPhotocatalytic CO2 reduction to syngas using nickel phosphide-loaded CdS under visible light irradiation0 aPhotocatalytic CO2 reduction to syngas using nickel phosphideloa cAPR  a0250190 v63 a

Photocatalytic CO2 reduction is a sustainable pathway to produce syngas (H-2 + CO), which is a key feedstock for the production of several important liquid fuels on the industrial scale. However, achieving an appropriate tunable ratio of H-2:CO in syngas for commercial purposes is a challenging task. In this work, we present a low-cost and non-noble metal, phosphide-based co-catalyst-Ni2P-loaded cadmium sulfide (CdS) photocatalyst system, for photocatalytic CO2 reduction. As a co-catalyst, Ni2P fosters an efficient charge separation of photoexcited charges generated in the CdS production of syngas. In total, 3 wt.% Ni2P/CdS exhibited exceptional performance of 50.6 mu mol g(-1) h(-1) in the CO evolution rate and 115 mu mol g(-1) h(-1) in the H-2 evolution rate, with a syngas composition varying from 2 to 4 in the H-2:CO ratio. Furthermore, first-principles density functional theory calculations were performed to study the surface energetics of the catalyst system and the results are found to be consistent with our experimental findings. Indeed, they establish that the composite favors CO2 photoreduction into syngas more efficiently than pure surfaces.

10aCdS10aCO2 reduction10aPhotocatalysis10aSyngas10atransition metal phosphides1 aYadav, Poonam1 aKumar, Santosh1 aVelankanni, Nandhakumar1 aKuehne, Thomas, D.1 aGosavi, Suresh1 aRaghupathy, Ramya, Kormath Ma1 aBhosale, Reshma1 aHeld, Georg1 aShelke, Manjusha1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/photocatalytic-co2-reduction-syngas-using-nickel-phosphide-loaded-cds-under-visible-light