01551nas a2200193   4500008004100000022001400041245009000055210006900145260010600214300001200320490000800332520078800340653003501128653002301163653001901186100001801205700002501223856010901248       2005                        eng d  a0038-109800aElectronic structure and ferromagnetism of polycrystalline Zn1-xCoxO (0 <= x <= 0.15)0 aElectronic structure and ferromagnetism of polycrystalline Zn1xC  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcJUN  a665-6690 v1343 a<p>The electronic structure of polycrystalline ferromagnetic Zn1-x,CoxO (0.05 &lt;= x &lt;= 0.15) and the oxidation state of Co in it, have been investigated. The Co-doped polycrystalline samples are synthesized by a combustion method and are ferromagnetic at room temperature. XPS and optical absorption studies show evidence for Co2+ ions in the tetrahedral symmetry, indicating, substitution of Co2+ in the ZnO lattice. However, powder XRD and electron diffraction data shock the presence of Co metal in the samples. This give evidence to the fact that some Co2+ ion are incorporated in the ZnO lattice which gives changes in the electronic structure whereas ferromagnetism comes from the Co metal impurities present in the samples. (c) 2005 Elsevier Ltd. All rights reserved.</p>10aMagnetically ordered materials10aOptical properties10aSemiconductors1 aDeka, Sasanka1 aJoy, Pattayil, Alias  uhttps://library.ncl.res.in/content/electronic-structure-and-ferromagnetism-polycrystalline-zn1-xcoxo-0-002012nas a2200277   4500008004100000022001400041245012300055210006900178260010600247300001400353490000700367520099000374653002801364653002301392653002401415653001901439653002301458100002501481700002101506700001401527700001701541700001601558700001401574700002701588856011901615       2005                        eng d  a0025-540800aGrowth of PbS nanopyramidal particulate films for potential applications in quantum-dot photovoltaics and nanoantennas0 aGrowth of PbS nanopyramidal particulate films for potential appl  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcAUG  a1353-13600 v403 a<p>We report a simple interfacial process called the liquid-liquid interface reaction technique (LLIRT) that leads to the formation of nanosized PbS particulate films with hitherto unreported pyramidal morphology. The resultant PbS films were characterized by transmission electron microscopy (TEM) with selected area electron diffraction (SAED), X-ray diffractometery (XRD), atomic force microscopy (AFM), near field scanning optical microscopy (NSOM) and UV-vis spectroscopy. The pyramidal morphology is speculated to originate from the preferred orientation of the 2 2 0 plane of cubic PbS. Our nanopyramidal PbS particulate films display remarkably sharp excitonic peak centered around 656 nm that accounts for a band gap of 1.8 eV suggesting, in turn, their potential application in QD photovoltaics. Interestingly, the feasibility of such nanopyramids to potentially act as nanoantennas (as revealed by the NSOM) is also suggested. (c) 2005 Elsevier Ltd. All rights reserved.</p>10aAtomic force microscopy10aChemical synthesis10aElectron microscopy10aNanostructures10aOptical properties1 aHawaldar, Ranjit, R.1 aMulik, Uttam, P.1 aPatil, K.1 aPasricha, R.1 aSathaye, S.1 aLewis, A.1 aAmalnerkar, Dinesh, P.  uhttps://library.ncl.res.in/content/growth-pbs-nanopyramidal-particulate-films-potential-applications-quantum-dot-002499nas a2200265   4500008004100000022001400041245016100055210006900216260006900285300001200354490000800366520146200374653003801836653003001874653001901904653002301923653003601946653002001982100001802002700002002020700002202040700002502062700002402087856012202111       2009                        eng d  a0254-058400aDoping-induced microstructural, textural and optical properties of In2Ti1-xVxO5+delta semiconductors and their role in the photocatalytic splitting of water0 aDopinginduced microstructural textural and optical properties of  aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcOCT  a399-4070 v1173 a<p>The physicochemical properties of V-doped indium titanates (In2Ti1-xVxO5-delta, 0.0 &lt;= x &lt;= 0.2) were investigated by using XPS, powder XRD, UV-vis, SEM and luminescence spectroscopy techniques. The Rietveld refinement of XRD data revealed that even though the V-containing samples were isostructural with In2TiO5 (orthorhombic space group Pnma), a systematic x-dependent variation was noticeable in the Ti-O bond lengths in [TiO6] octahedral units, cell parameters and in the value of delta. XPS results confirmed the coexistence of V5+ and V4+ states, leading thereby to an enhancement in oxygen non-stoichiometry in the doped samples. A loading-dependent progressive shift from 400 to 750 nm was also observed in the onset of the absorption edge, indicating a significant narrowing of the band gap. Furthermore, the samples with higher V-content were comprised of the grain clusters having larger size and an irregular shape. The UV-vis. photoluminescence and thermoluminescence studies indicate that the doping-induced lattice defects may give rise to certain closely spaced acceptor/donor energy levels in between the band gap of host matrix. The indium titanates are found to serve as stable photocatalysts for water splitting under visible light, where oxygen was the major reaction product. The role of microstructural and morphological properties in the photocatalytic activity is discussed. (C) 2009 Elsevier B.V. All rights reserved.</p>10aIn2Ti1-xVxO5+delta photocatalysts10aLuminescence spectroscopy10aMicrostructure10aOptical properties10aStructure-activity relationship10awater splitting1 aShah, Pallavi1 aBhange, Deu, S.1 aDeshpande, Aparna1 aKulkarni, Mukund, S.1 aGupta, Narendra, M.  uhttps://library.ncl.res.in/content/doping-induced-microstructural-textural-and-optical-properties-in2ti1-xvxo5delta-001910nas a2200241   4500008004100000022001400041245007900055210006900134260006900203300001200272490000800284520107600292653002201368653002301390653001801413653001901431653002301450100001901473700002701492700001901519700001701538856011301555       2009                        eng d  a0254-058400aNanocrystalline Mn-Zn-ferrite by novel oxalato-hydrazinated complex method0 aNanocrystalline MnZnferrite by novel oxalatohydrazinated complex  aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcSEP  a187-1910 v1173 a<p>We report here for the first time the synthesis of technologically important ferrite, using a metal oxalato-hydrazinate (MOH) complex method. The MOH complex of iron-manganese-zinc was synthesized at room temperature using the precursors, ferrous ammonium sulphate, manganese acetate and zinc acetate. Thermo-gravimetric studies of MOH intermediate showed complete phase formation of MnZnFe(2)O(4) at 280 degrees C. XRD data showed the formation of single phase cubic spinel MnZnFe(2)O(4). Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) demonstrate the spherical shape particle morphology. TEM images indicated the particle size of ferrite powder in the range of 20-36 nm. Magnetization of synthesized nano-sized Mn(0.69)Zn(.0.19)Fe(2.12)O(4) was observed coercive force (H(c)) at 127.82 Oe with a saturation magnetization (M(s)), 34.5 emu g(-1) using vibrating sample magnetometer (VSM) at room temperature. Mossbauer study of nano-sized ferrite powder showed super-paramagnteic behavior. (c) 2009 Elsevier B.V. All rights reserved.</p>10acrystal structure10aMagnetic materials10aMn-Zn-ferrite10aNanostructures10aOptical properties1 aKanade, K., G.1 aAmalnerkar, Dinesh, P.1 aPotdar, H., S.1 aKale, B., B.  uhttps://library.ncl.res.in/content/nanocrystalline-mn-zn-ferrite-novel-oxalato-hydrazinated-complex-method-001646nas a2200241   4500008004100000022001400041245009700055210006900152260006900221300001000290490000800300520079800308653001201106653002301118653001501141653002201156100002001178700001901198700001801217700001901235700002201254856012801276       2010                        eng d  a0925-838800aPreparation and characterization of CuInSe2 thin films by chemical bath deposition technique0 aPreparation and characterization of CuInSe2 thin films by chemic  aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcJUN  a78-810 v5003 a<p>Copper indium diselenide (CIS) thin films have been deposited using a precursor solution containing copper sulphate, indium trichoride, hydrazine hydrate and sodium selenosulphate in an aqueous alkaline medium at room temperature. The as grown brown colored films were found to be well adherent to glass substrates. The films were characterized by X-ray diffraction, scanning electron microscopy, atomic absorption spectroscopy, optical absorption, electrical resistivity, and thermo electric measurement techniques. The analysis of optical absorption data shows band-gap energy (E-g) to be 1.1 eV. The electrical resistivity of the thin film was found to be of the order of 10(2) (Omega cm). Thermoelectric power measurement shows n-type conduction. (C) 2010 Published by Elsevier B.V.</p>10aCuInSe210aOptical properties10aThin films10aX-ray diffraction1 aHankare, P., P.1 aRathod, K., C.1 aChate, P., A.1 aJadhav, A., V.1 aMulla, Imtiaz, S.  uhttps://library.ncl.res.in/content/preparation-and-characterization-cuinse2-thin-films-chemical-bath-deposition-technique-001991nas a2200229   4500008004100000022001400041245011500055210006900170260010600239300001200345490000700357520109500364653002501459653001201484653001901496653002301515653001801538100002801556700002201584700002501606856013001631       2011                        eng d  a0025-540800aLow temperature pH dependent synthesis of flower-like ZnO nanostructures with enhanced photocatalytic activity0 aLow temperature pH dependent synthesis of flowerlike ZnO nanostr  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcMAY  a771-7780 v463 a<p>In the present study we have synthesized flower-like ZnO nanostructures comprising of nanobelts of 20 nm width by template and surfactant free low-temperature (4 degrees C) aqueous solution route. The ZnO nanostructures exhibit flower-like morphology, having crystalline hexagonal wurtzite structure with (001) orientation. The flowers with size between 600 and 700 nm consist of ZnO units having crystallite size of similar to 40 nm. Chemical and structural characterization reveals a significant role of precursor: ligand molar ratio, pH, and temperature in the formation of single-step flower-like ZnO at low temperature. Plausible growth mechanism for the formation of flower-like structure has been discussed in detail. Photoluminescence studies confirm formation of ZnO with the defects in crystal structure. The flower-like ZnO nanostructures exhibit enhanced photochemical degradation of methylene blue (MB) with the increased concentration of ligand, indicating attribution of structural features in the photocatalytic properties. (C) 2010 Elsevier Ltd. All rights reserved.</p>10aCatalytic properties10aDefects10aNanostructures10aOptical properties10aSemiconductor1 aVaishampayan, Mukta, V.1 aMulla, Imtiaz, S.1 aJoshi, Satyawati, S.  uhttps://library.ncl.res.in/content/low-temperature-ph-dependent-synthesis-flower-zno-nanostructures-enhanced-photocatalytic-001844nas a2200253   4500008004100000022001400041245011700055210006900172260007300241300001400314490000800328520092800336653002501264653002301289653002201312653001301334653001101347653002301358100002401381700002301405700002001428700002001448856012201468       2011                        eng d  a0168-583X00aMorphological changes in nanoparticulate silver films due to electron beam irradiation of polystyrene substrates0 aMorphological changes in nanoparticulate silver films due to ele  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJUL  a1534-15390 v2693 a<p>Results of the studies on the effect of 8 MeV electron beam irradiation of polystyrene substrates on the morphology of silver particulate films deposited at 455 K in a vacuum of 8 x 10(-6) Torr are reported. Optical absorption studies show the presence of transverse and longitudinal plasmon resonance for films deposited on irradiated polystyrene. Scanning electron microscopy reveals a decrease in particle size with smaller inter-particle separation for irradiated films. Larger clusters are formed in the case of films deposited on polystyrene after 300 h of irradiation. In this paper, we show that the morphology of silver nanoparticulate films can be modified by electron irradiation of inert polymer substrates like polystyrene. The change observed due to irradiation is attributed to the formation of free radicals, thereby altering the polymer-metal interaction. (C) 2011 Elsevier B.V. All rights reserved.</p>10aElectron bombardment10aOptical properties10aParticulate films10aPolymers10aSilver10asurface morphology1 aPattabi, Manjunatha1 aGurumurthy, S., C.1 aSanjeev, Ganesh1 aGaikwad, A., B.  uhttps://library.ncl.res.in/content/morphological-changes-nanoparticulate-silver-films-due-electron-beam-irradiation-002117nas a2200253   4500008004100000022001400041245010700055210006900162260006900231300001200300490000800312520124100320653001201561653001801573653002301591653001601614100001801630700001901648700001801667700001601685700001701701700001901718856012601737       2011                        eng d  a0254-058400aSynthesis and characterization of CdS/PVA nanocomposite thin films from a complexing agent free system0 aSynthesis and characterization of CdSPVA nanocomposite thin film  aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcDEC  a223-2290 v1313 a<p>CdS/PVA nanocomposite thin films have been deposited on glass substrates by in situ thermolysis of precursors dispersed in polyvinyl alcohol (PVA). The synthetic technique reported in this study is free from complexing agent and hence no need to control the pH of the solution as in the case of conventional CBD. The as-prepared films were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), selected area electron diffraction (SAED), UV-vis spectroscopy, and photoluminescence (PL) spectra. The XRD and SAED results indicated the formation of CdS nanoparticles with hexagonal phase in the PVA matrix. The photoluminescence and UV-vis spectroscopy revealed that CdS/PVA films showed quantum confinement effect. From the shift in optical band gap, particle sizes were calculated using effective mass approximation (EMA) method and it was found to be in agreement with the results obtained from TEM observations. The SEM results indicated that as grown films were homogeneous with no visible pinholes and cracks. The film prepared at 100 degrees C was found to be suitable for application as a window layer in solar cell. (C) 2011 Elsevier B.V. All rights reserved.</p>10aCdS/PVA10aNanocomposite10aOptical properties10aThermolysis1 aSaikia, Dulen1 aSaikia, P., K.1 aGogoi, P., K.1 aDas, M., R.1 aSengupta, P.1 aShelke, M., V.  uhttps://library.ncl.res.in/content/synthesis-and-characterization-cdspva-nanocomposite-thin-films-complexing-agent-free-002623nas a2200217   4500008004100000022001400041245008300055210006900138260010600207300001400313490000700327520181700334653002402151653001802175653002302193653001102216653002202227100002202249700001702271856011702288       2013                        eng d  a0025-540800aFungus mediated synthesis of biomedically important cerium oxide nanoparticles0 aFungus mediated synthesis of biomedically important cerium oxide  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcOCT  a4134-41380 v483 a<p>Nanomaterials can be synthesized by chemical, physical and the more recently discovered biological routes. The biological routes are advantageous over the chemical and physical ones as unlike these, the biological synthesis protocols occur at ambient conditions, are cheap, non-toxic and eco-friendly. Although purely biological and bioinspired methods for the synthesis of nanomaterials are environmentally benign and energy conserving processes, their true potential has not been explored yet and attempts are being made to extend the formation of technologically important nanoparticles using microorganisms like fungi. Though there have been reports on the biosynthesis of oxide nanoparticles by our group in the past, no attempts have been made to employ fungi for the synthesis of nanoparticles of rare earth metals or lanthanides. Here we report for the first time, the bin-inspired synthesis of biomedically important cerium oxide (CeO2) nanoparticles using the thermophilic fungus Humicola sp. The fungus Humicola sp. when exposed to aqueous solutions of oxide precursor cerium (III) nitrate hexahydrate (CeN3O9 center dot 6H(2)O) results in the extracellular formation of CeO2 nanoparticles containing Ce (III) and Ce (IV) mixed oxidation states, confirmed by X-ray Photoemission Spectroscopy (XPS). The formed nanoparticles are naturally capped by proteins secreted by the fungus and thus do not agglomerate, are highly stable, water dispersible and are highly fluorescent as well. The biosynthesized nanoparticles were characterized by UV-vis spectroscopy, Photoluminescence spectroscopy (PL), Transmission Electron Microscopy (TEM), Fourier Transform Infrared Spectroscopy (FTIR), X-Ray Diffraction (XRD) and X-ray Photoemission Spectroscopy (XPS). (c) 2013 Elsevier Ltd. All rights reserved.</p>10aElectron microscopy10aNanostuctures10aOptical properties10aOxides10aX-ray diffraction1 aKhan, Shadab, Ali1 aAhmad, Absar  uhttps://library.ncl.res.in/content/fungus-mediated-synthesis-biomedically-important-cerium-oxide-nanoparticles-001940nas a2200229   4500008004100000022001400041245011800055210006900173260007300242300001200315490000800327520106900335653002201404653002401426653001701450653002301467653002401490100002401514700001801538700002301556856013101579       2013                        eng d  a0022-231300aOne pot synthesis, growth mechanism and optical properties of Zn1-xCdxSe graded core/shell and alloy nanocrystals0 aOne pot synthesis growth mechanism and optical properties of Zn1  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcMAR  a154-1590 v1353 a<p>Comparatively higher photoluminescence yield along with robustness of core/shell semiconductor nanocrystals make them attractive candidates for studying intricate quantum size effects. Here, we report, one pot synthesis of Zn1-xCdxSe graded core/shell structures by exploiting change in the reactivity of precursors. Optical and structural measurements indicate formation of graded structure. Growth mechanism probed by inductively coupled plasma atomic emission spectroscopy shows formation of graded core/shell structure, with CdSe rich core and ZnSe rich shell. Annealing these nanocrystals, in chemical bath, leads to diffusion of Cd from core to shell region. Formation of Zn1-xCdxSe alloy is also observed in X-ray photoelectron spectroscopic measurements, confirming the diffusion of Cd from core to shell region. Substantially high photoluminescence quantum efficiency of 60% with narrow line width of about 27 nm, was observed and is attributable to the reduced strain due to graded core/shell structure. (C) 2012 Elsevier B.V. All rights reserved.</p>10aGraded core/shell10aII-VI Semiconductor10aLuminescence10aOptical properties10aSemiconductor alloy1 aSonawane, Kiran, G.1 aPatil, K., R.1 aMahamuni, Shailaja  uhttps://library.ncl.res.in/content/one-pot-synthesis-growth-mechanism-and-optical-properties-zn1-xcdxse-graded-coreshell-and-002045nas a2200253   4500008004100000022001400041245008100055210006900136260007300205300001200278490000800290520113200298653002101430653002201451653001801473653002701491653003701518653002601555653002301581100002301604700002301627700003001650856011101680       2013                        eng d  a0927-775700aSynthesis of triangular gold nanoplates: role of bromide ion and temperature0 aSynthesis of triangular gold nanoplates role of bromide ion and   aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcAPR  a181-1900 v4223 a<p>Synthesis of noble metal triangular nanoplates is a kinetically controlled process in which temperature and packing defects play a major role. Nucleation and growth process of kinetically controlled reaction can be greatly influenced by temperature affecting the yield and edge length of the triangles. Through a conventional batch mode process, here we study the effect of temperature on nucleation and growth of gold triangular nanoplates and obtain some insight of the temperature effects on the final yield and edge length of triangles. The role of Br- ions in the synthesis of triangular nanoplates is studied by varying the amount of CAB and by replacing the CTAB with HBr. The results show that, while CTAB controls the edge length and yield of triangles, its use is not mandatory to attain plate like morphology. Finally we show that, while the initial temperature of the reaction mixture governs the nucleation rate and the rate of temperature rise governs the growth rate of particles, they along with the concentration of Br- ions control the edge length and yield. (C) 2013 Elsevier B.V. All rights reserved.</p>10aAu nanotriangles10aHalide ion effect10aheat transfer10aKinetically controlled10aNature of gold precursor complex10aNucleation and growth10aOptical properties1 aKumar, D., V. Ravi1 aKulkarni, Amol, A.1 aPrasad, Bhagavatula L. V.  uhttps://library.ncl.res.in/content/synthesis-triangular-gold-nanoplates-role-bromide-ion-and-temperature-001602nas a2200229   4500008004100000022001400041245010900055210006900164260008100233300001100314490000600325520076600331653000901097653000901106653001801115653001501133653002301148100002301171700002601194700002401220856012801244       2014                        eng d  a2053-159100aMoS2 nanoparticles and h-BN nanosheets from direct exfoliation of bulk powder: one-step synthesis method0 aMoS2 nanoparticles and hBN nanosheets from direct exfoliation of  aTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLANDbIOP PUBLISHING LTDcSEP  a0350380 v13 a<p>We report facile synthesis of MoS2 nanoparticles and h-BN nanosheets using ultrasonication method in suitable solvents such as N-Methyl-2-pyrrolidone and ethylene glycol, respectively. The average size of MoS2 nanoparticles observed from TEM analysis were 4-5 nm and about a few hundreds of nm for h-BN nanosheets. Raman spectroscopy carried out on nanoparticle samples confirms the formation of MoS2 nanoparticles and h-BN nanosheets. UV-vis absorption and photoluminescence (PL) measurements carried out on the products show typical absorption and luminescence spectra of MoS2 and h-BN. Further, we attempted to decorate gold nanoparticles on nanosheets of MoS2 and h-BN which show subsequent change in Raman spectra due to charge transfer interaction.</p>10ah-BN10aMoS210aNanoparticles10ananosheets10aOptical properties1 aThripuranthaka, M.1 aRout, Chandra, Sekhar1 aLate, Dattatray, J.  uhttps://library.ncl.res.in/content/mos2-nanoparticles-and-h-bn-nanosheets-direct-exfoliation-bulk-powder-one-step-synthesis02356nas a2200265   4500008004100000022001400041245016800055210006900223260010600292300001400398490000700412520129400419653003001713653002001743653001701763653002301780653004101803100002001844700001701864700002401881700001601905700001601921700002201937856013101959       2014                        eng d  a0360-319900aPhotoelectrochemical splitting of water with nanocrystalline Zn1-xMnxO thin films: first-principle DFT computations supporting the systematic experimental endeavor0 aPhotoelectrochemical splitting of water with nanocrystalline Zn1  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcMAR  a3637-36480 v393 a<p>Photoelectrochemical splitting of water with nanocrystalline Zn1-xMnxO thin films was investigated. ZnO thin films with 1, 3, 5 and 7% at. Mn incorporation were synthesized by sol gel method and characterized by X-Ray Diffraction (XRD) analysis, Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), X-ray Photoelectron spectroscopy (XPS), High Resolution Transmission Electron Microscopy (HR-TEM) and UV-Vis spectroscopy. Mn incorporation coupled with variation in sintering temperature led to significant microstructural changes, which tentatively influenced the magnitude of optical absorption and charge carrier mobility, thereby impacting the performance of such systems towards photoelectrochemical splitting of water. Electronic structure computations based on first principle density functional theory (DFT) revealed electronic states of Mn being responsible for the marginally recorded red shift in bandgap energy. Photoelectrochemical measurements using thin films of 1% at. Mn:ZnO sintered at 600 degrees C yielded 3 times enhanced photocurrent at zero bias due to improved optical absorption. Plausible explanations for the effect have also been offered. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.</p>10aDensity functional theory10aHydrogen energy10aMn doped ZnO10aOptical properties10aPhotoelectrochemical water splitting1 aSharma, Vidhika1 aDixit, Mudit1 aSatsangi, Vibha, R.1 aDass, Sahab1 aPal, Sourav1 aShrivastav, Rohit  uhttps://library.ncl.res.in/content/photoelectrochemical-splitting-water-nanocrystalline-zn1-xmnxo-thin-films-first-principle-002225nas a2200301   4500008004100000022001400041245013400055210006900189260006900258300001200327490000800339520114800347653003001495653001901525653001901544653002301563653003501586653003801621653001701659100001501676700001801691700001601709700001701725700001401742700002401756700002201780856012101802       2016                        eng d  a0254-058400aSynthesis and self-assembly of dumbbell shaped ZnO sub-micron structures using low temperature chemical bath deposition technique0 aSynthesis and selfassembly of dumbbell shaped ZnO submicron stru  aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcFEB  a152-1570 v1693 a<p>We report well dispersed horizontal growth of ZnO sub-micron structures using simplest technique ever known i.e. chemical bath deposition (CBD). A set of samples were prepared under two different cases A) dumbbell shaped ZnO grown in CBD bath and B) tubular ZnO structures evolved from dumbbell shaped structures by dissolution mechanism. Single phase wurtzite ZnO formation is confirmed using X-ray diffraction (XRD) technique in both cases. From the morphological investigations performed using scanning electron microscopy (SEM), sample prepared under case A indicate formation of hex bit tool (HBT) shaped ZnO crystals, which observed to self-organize to form dumbbell structures. Further these microstructures are then converted into tubular structures as a fragment of post CBD process. The possible mechanism responsible for the self-assembly of HBT units to form dumbbell structures is discussed. Observed free excitonic peak located at 370 nm in photoluminescence (PL) spectra recorded at 18 K indicate that the micro/nanostructures synthesized using CBD are of high optical quality. (C) 2015 Elsevier B.V. All rights reserved.</p>10aElectron microscopy (STEM10aMicrostructure10aNanostructures10aOptical properties10aPhotoluminescence spectroscopy10aRaman spectroscopy and scattering10aTEM and SEM)1 aBorade, P.1 aJoshi, K., U.1 aGokarna, A.1 aLerondel, G.1 aWalke, P.1 aLate, Dattatray, J.1 aJejurikar, S., M.  uhttps://library.ncl.res.in/content/synthesis-and-self-assembly-dumbbell-shaped-zno-sub-micron-structures-using-low-001741nas a2200241   4500008004100000022001400041245017200055210006900227260008600296300001200382490000700394520074800401653003701149653002701186653002101213653002301234653002201257653002301279100002701302700002501329700001901354856012601373       2016                        eng d  a1060-132500aSynthesis of 2-phenoxy-2-phenylethyl acrylate and copolymerization with 2-phenylethyl acrylate: estimation of monomer reactivity ratios, thermal and optical properties0 aSynthesis of 2phenoxy2phenylethyl acrylate and copolymerization   a530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USAbTAYLOR & FRANCIS INCcMAY  a457-4640 v533 a<p>A new aromatic based monomer 2-phenoxy-2-phenylethyl acrylate (PPEA) was synthesized. Copolymers of PPEA with 2-phenylethyl acrylate (PEA) were prepared by free radical polymerization. The reactivity ratios were estimated using various graphical methods. Structural parameters of the copolymers were obtained by calculating the dyad monomer sequence fractions and the mean sequence length. Optical properties of polymers such as refractive indices and UV-Visible absorption were investigated. The glass transition temperature and thermal degradation behavior of the copolymers were studied. Combined with the RI, transparency and thermal properties, prepared copolymers hold great promise as materials for intraocular lens applications.</p>10a2-Phenoxy-2-phenylethyl acrylate10a2-phenylethyl acrylate10acopolymerization10aOptical properties10areactivity ratios10aThermal properties1 aGhorpade, Ravindra, V.1 aPonrathnam, Surendra1 aChavan, Nayaku  uhttps://library.ncl.res.in/content/synthesis-2-phenoxy-2-phenylethyl-acrylate-and-copolymerization-2-phenylethyl-acrylate02277nas a2200217   4500008004100000022001400041245014600055210006900201260000900270300001200279490000800291520147800299653002201777653003001799653002301829653002501852100001801877700001501895700002201910856012701932       2018                        eng d  a0038-092X00aRevealing optoelectronic and transport properties of potential perovskites Cs2PdX6 (X = Cl, Br): A probe from density functional theory (DFT)0 aRevealing optoelectronic and transport properties of potential p  cMAR   a336-3430 v1623 a<p>Metal-halide perovskites are rapidly emerging crystalline materials that are reasonably preferred as leading aspirant for applications in optoelectronic and thermoelectric devices. In this paper, we have thoroughly reviewed and performed calculations to reveal optoelectronic and transport properties for a potential newcomer, Cs2PdX6 (X = Cl, Br) termed as Cesium Palladium Halides (CPH). Outcome of present computations are compared with available results and a reasonable agreement is recorded. Energy band gap computations performed reveal indirect band gap of 2.29 eV for Cs2PdC16, which substantially reduces to 1.22 eV when `Cl' is replaced by `Br'. Optical absorption spectra investigations performed here, in the energy range from 3 to 5 eV confirms effective utilization of these compounds in solar cells and other optoelectronic applications. In addition, the transport properties computations performed using semi-classical Boltzmann theory, shows constant pattern of thereto power near ambient temperature range (200-500 K), which admits possible utilization of these compounds as low temperature thermoelectric materials. Performed ZT calculations demonstrates reasonably good thermoelectric performance for both materials, as there exist minor variation (0.1) in the values over wide temperature ranges i.e. from 100 to 800 K. Further, detailed analysis of transport properties predicts p-type semiconducting nature of the present series of materials.</p>10aAb-initio studies10aDensity functional theory10aOptical properties10aTransport properties1 aBhamu, K., C.1 aSoni, Amit1 aSahariya, Jagrati  uhttps://library.ncl.res.in/content/revealing-optoelectronic-and-transport-properties-potential-perovskites-cs2pdx6-x-cl-br02295nas a2200217   4500008004100000022001400041245016500055210006900220260000800289300001100297490000800308520148300316653003001799653002501829653002301854653001601877100001501893700001801908700002201926856012901948       2020                        eng d  a0925-838800aInvestigating effect of strain on electronic and optical properties of lead free double perovskite Cs2AgInCl6 solar cell compound: A first principle calculation0 aInvestigating effect of strain on electronic and optical propert  cMAR  a1527580 v8173 a<p>Despite serious problems associated with toxicity of lead, lead halide perovskite based solar cells have resulted with remarkable efficiency and hence gained much interest. To overcome this aspect, numerous solutions are attempted by researchers which include the development of new environmental friendly lead free double perovskite (DP) photovoltaic materials. Enlightening on the same line, we report first principle calculations on electronic and optical properties of Cs2AgInCl6 solar photovoltaic materials. Present opto-electronic computations for lead free DP compound, have been performed using the full potential linearized augmented plane wave method. In present investigations, we have adopted exchange and correlation potentials prescribed by Perdew et al. and the most accurate Tran-Blaha modified Becke-Johnson. Both exchange and correlation potential computations are performed with and without spin orbit coupling. Results obtained for electronic and optical properties are validated by systematic comparison with available experimental data. Reasonable reconciliation between investigated results and the available experimental data, endorse accuracy of present computations. To identify the effect of strain on energy gap and hence on the optical properties of Cs2AgInCl6 compound, computations of electronic and optical properties have also been performed under the different values of strain application. (C) 2019 Elsevier B.V. All rights reserved.</p>
10aDensity functional theory10aElectronic Structure10aOptical properties10asolar cells1 aSoni, Amit1 aBhamu, K., C.1 aSahariya, Jagrati  uhttps://library.ncl.res.in/content/investigating-effect-strain-electronic-and-optical-properties-lead-free-double-perovskite02275nas a2200289   4500008004100000022001400041245007000055210006900125260000800194490000700202520140500209653001801614653001101632653002301643653001301666653002701679100002301706700002301729700002101752700001701773700001601790700001301806700002001819700002401839700002301863856009901886       2023                        eng d  a0935-964800aUltrafast spectroscopy of plasmons and free carriers in 2D MXenes0 aUltrafast spectroscopy of plasmons and free carriers in 2D MXene  cFEB0 v353 a<p>
	2D MXenes have diverse and chemically tunable optical properties that arise from an interplay between free carriers, interband transitions, and plasmon resonances. The nature of photoexcitations and their dynamics in three different members of the MXene family, Ti3C2, Mo2Ti2C3, and Nb2C, are investigated using two complementary pump-probe techniques, transient optical absorption, and time-resolved terahertz (THz) spectroscopy. Measurements reveal pronounced plasmonic effects in the visible and near-IR in all three. Optical excitation, with either 400 or 800 nm pulses, results in a rapid increase in lattice temperature, evidenced by a pronounced broadening of the plasmon mode that presents as a plasmon bleach in transient absorption measurements. Observed kinetics of plasmon bleach recovery provide a means to monitor lattice cooling. Remarkably slow cooling, proceeding over hundreds of picoseconds to nanoseconds time scales, implies MXenes have low thermal conductivities. The slowest recovery kinetics are observed in the MXene with the highest free carrier density, viz. Ti3C2, that supports phonon scattering by free carriers as a possible mechanism limiting thermal conductivity. These new insights into photoexcitation dynamics can facilitate their applications in photothermal solar energy conversion, plasmonic devices, and even photothermal therapy and drug delivery.</p>
10a2D properties10aMXenes10aOptical properties10aplasmons10aultrafast spectroscopy1 aColin-Ulloa, Erika1 aFitzgerald, Andrew1 aMontazeri, Kiana1 aMann, Javery1 aNatu, Varun1 aNgo, Ken1 aUzarski, Joshua1 aBarsoum, Michel, W.1 aTitova, Lyubov, V.  uhttps://library.ncl.res.in/content/ultrafast-spectroscopy-plasmons-and-free-carriers-2d-mxenes01703nas a2200205   4500008004100000022001400041245010200055210006900157260000800226300001400234490000800248520097000256653002501226653002301251653001701274653002701291100002001318700003101338856012801369       2024                        eng d  a0031-865500aOne-pot, easy and scalable synthesis of large-size short wave length IR emitting PbS quantum dots0 aOnepot easy and scalable synthesis of largesize short wave lengt  cJUL  a1020-10300 v1003 a<p>
	This study presents a versatile and efficient method to synthesize large-size lead sulfide (PbS) quantum dots (QDs) that display emission in the short-wave infrared (SWIR) region, using accessible and stable diethylammonium diethyldithiocarbamate (C-2)(2)DTCA and octylammonium octyldithiocarbamate (C(8)DTCA) as sulfur sources. As these sulfur sources enable the formation of well-dispersed, large-size PbS QDs in a very convenient way, this method can further be taken up for scale-up studies. Importantly, this approach allows precise control over QD sizes, thereby enhancing their SWIR optical properties. By adjusting the hot injection temperatures and sulfur source concentrations, different synthesis routes are explored, providing flexibility for the desired QD characteristics. The results presented here offer a promising opportunity to leverage the synthesized PbS QDs in applications such as optoelectronics, sensors, and imaging technology.</p>
10ahot injection method10aOptical properties10aquantum dots10ashort wave IR emission1 aSahu, Umasharan1 aPrasad, Bhagavatula, L. V.  uhttps://library.ncl.res.in/content/one-pot-easy-and-scalable-synthesis-large-size-short-wave-length-ir-emitting-pbs-quantum