01717nas a2200229 4500008004100000022001400041245011200055210006900167260007400236300001400310490000700324520087600331100001901207700001601226700002001242700002001262700002201282700002201304700001401326700002101340856012601361 2005 eng d a0022-246100aStudy of correlation of structural and surface properties with electrochemical behaviour in carbon aerogels0 aStudy of correlation of structural and surface properties with e aVAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDSbSPRINGERcJUL a3777-37820 v403 a

Carbon aerogel is a promising material for electrochemical double layer capacitors. In this paper carbon aerogels prepared by subcritical drying method are investigated for the change in the structure and surface properties at different pyrolysis temperatures. The important relations between structure, morphology, surface area and electrical properties were studied using X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), surface area measurement and cyclic voltametry. It is shown that structure and the surface functional groups play important role in enhancement of electrochemical capacitance. The specific capacitance achieved was 114 F/gm which is quite large value for subcritically prepared carbon aerogels without any kind of activation process. (c) 2005 Springer Science + Business Media, Inc.

1 aHebalkar, Neha1 aArabale, G.1 aSainkar, S., R.1 aPradhan, S., D.1 aMulla, Imtiaz, S.1 aVijayamohanan, K.1 aAyyub, P.1 aKulkarni, S., K. uhttps://library.ncl.res.in/content/study-correlation-structural-and-surface-properties-electrochemical-behaviour-carbon-002128nas a2200253 4500008004100000022001400041245011800055210006900173260009500242300001200337490000800349520114900357653002301506653001401529653002301543653003501566653001801601653003501619100002101654700002801675700002201703700001901725856013001744 2006 eng d a0021-979700aSuppression of electron-transfer characteristics of ferrocene by OTS monolayer on a silicon/electrolyte interface0 aSuppression of electrontransfer characteristics of ferrocene by  a525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USAbACADEMIC PRESS INC ELSEVIER SCIENCEcJUL a777-7840 v2993 a

The passivating behavior of self-assembled monolayers (SAMs) of octadecyltrichlorosilane (OTS) on an n-type Si(100) electrode with and without a redox species like ferrocene in a polar non-aqueous medium has been investigated using techniques like contact angle measurements, Fourier transform infrared (FTIR) spectroscopy and X-ray photoelectron spectroscopy (XPS) to understand the role of the monolayer. The electron-transfer behavior of ferrocene is found to be drastically affected by the presence of monolayer and the reasons for these are analyzed as a function of the change in resistance, dielectric thickness and coverage of the monolayer. Electrochemical impedance analysis in the presence of ferrocene gives the monolayer coverage as 0.998 and the apparent rate constant calculated from this gives 4.85 x 10(-12) cm s(-1) in comparison with 4.4 x 10(-8) cm s(-1) for a similar electrode without any monolayer. A positive shift of 200 mV in the flat-band potential after monolayer formation also suggests the covalent coupling of the silane nionolayer offering a protective barrier. (c) 2006 Elsevier Inc. All rights reserved.

10acyclic voltammetry10aferrocene10aimpedance analysis10aoctadecyltrichlorosilane (OTS)10arate constant10aself-assembled monolayer (SAM)1 aKulkarni, S., A.1 aKakade, Bhalchandra, A.1 aMulla, Imtiaz, S.1 aPillai, V., K. uhttps://library.ncl.res.in/content/suppression-electron-transfer-characteristics-ferrocene-ots-monolayer-siliconelectrolyte-002649nas a2200193 4500008004100000022001400041245009900055210006900154260007100223300001600294490000800310520188000318100002502198700002502223700002302248700002202271700003002293856013202323 2007 eng d a1932-744700aSurface-state-mediated electron transfer at nanostructured ZnO multipod/electrolyte interfaces0 aSurfacestatemediated electron transfer at nanostructured ZnO mul a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcSEP a13092-131020 v1113 a

Redox kinetics of cyanoferrate(III) species adsorbed at an n-type ZnO multipod/electrolyte interface is explored using electrochemical techniques like cyclic voltammetry and impedance spectroscopy. The electrochemical impedance results are analyzed using a fluctuating energy level model, assuming isoenergetic tunneling of majority carriers through the Helmholtz layer. A shift in the slope of Mott-Schottky plots (C-sc(-2) versus E) together with evidence from cyclic voltammetry shows that the electron-transfer process is mediated by surface states formed because of the adsorption of ferricyanide ions (as evident from the results of Fourier transform infrared spectroscopy). More significantly, the pH of zero charge (point of zero zeta potential, pzzp) of ZnO multipods is found to be 4.5 (from capacitance vs pH plots) compared to that of bulk ZnO (pH 9.5), which could be explained on the basis of a lowering in the work function of the nanostructured semiconductor and its consequent susceptibility to the formation of surface states. This is in excellent agreement with our earlier observation of ultralow threshold field emission with this material in the light of the linear dependence of pzzp with work function of the electrode material. The flat-band potential of the nanostructures is found to be 200 mV more negative than that reported for bulk n-type ZnO electrodes, indicating a higher doping density in the former. A three-dimensional mapping of charge distribution in the surface states is attempted by correlating the capacitance response of the system subjected to a sinusoidal potential modulation to the semiconductor electrode with that resulting from a systematic variation of the redox potential of the dissolved acceptor (achieved by varying the pH of the electrolyte) which further reveals the polyenergetic nature of the surface states.

1 aParthasarathy, Meera1 aRamgir, Niranjan, S.1 aSathe, Bhaskar, R.1 aMulla, Imtiaz, S.1 aPillai, Vijayamohanan, K. uhttps://library.ncl.res.in/content/surface-state-mediated-electron-transfer-nanostructured-zno-multipodelectrolyte-interfaces-002173nas a2200229 4500008004100000022001400041245010300055210006900158260010600227300001200333490000700345520131000352653002301662653001801685100001801703700001801721700002001739700002101759700002201780700002001802856012101822 2008 eng d a0022-369700aSynthesis, characterization of chemically deposited indium selenide thin films at room temperature0 aSynthesis characterization of chemically deposited indium seleni aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcJAN a249-2540 v693 a

Polycrystalline In2Se3 semiconducting thin films were prepared by using relatively simple chemical bath deposition method at room temperature by the reaction between indium chloride, tartaric acid, hydrazine hydrate and sodium selenosulphate in an aqueous alkaline medium. Various preparative conditions of thin film deposition are outlined. The as grown films were found to be transparent, uniform, well adherent and red in color. The films were characterized using X-ray diffraction (XRD), scanning electron microscopy, atomic absorption spectroscopy and energy dispersive atomic X-ray diffraction (EDAX). The XRD analysis of the film showed the presence of polycrystalline nature with hexagonal crystal structure. SEM study revels that the grains are homogenous, without cracks or pinholes and well covers the glass substrate. The optical absorption and electrical conductivity was measured. The direct optical band gap value for the films was found to be of the order of 2.35eV at room temperature and have specific electrical conductivity of the order of 10(-2) (Omega cm)(-1) showing n-type conduction mechanism. The utility of the adapted technique is discussed from the view-point of applications considering the optoelectric and structural data. (c) 2007 Elsevier Ltd. All rights reserved.

10aChemical synthesis10aSemiconductor1 aAsabe, M., R.1 aChate, P., A.1 aDelekar, S., D.1 aGaradkar, K., M.1 aMulla, Imtiaz, S.1 aHankare, P., P. uhttps://library.ncl.res.in/content/synthesis-characterization-chemically-deposited-indium-selenide-thin-films-room-001744nas a2200253 4500008004100000022001400041245006500055210006400120260006900184300001200253490000800265520089700273653002601170653001401196653003701210653002201247100002001269700002001289700001801309700002201327700002101349700002101370856009901391 2009 eng d a0925-838800aSynthesis and characterization of CoCrxFe2-xO4 nanoparticles0 aSynthesis and characterization of CoCrxFe2xO4 nanoparticles aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcOCT a798-8010 v4853 a

Spinel-phase nanocrystalline CoCrxFe2-xO4 powders (0.0 <= x <= 2.0) were synthesized by citrate-gel precursor method. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM). transmission electron microscopy (TEM) and infra-red spectroscopy (FT-IR). The XRD and selected-area electron diffraction (SAED) patterns indicated that the synthesized nanoparticles have single-phase spinet structure without the presence of any other impurities. The changes in electrical and magnetic properties of different stiochiometric compositions have also been investigated. It is seen that with increase in chromium contents, the measured magnetic hysteresis loops become narrow with decreasing trend in saturation magnetization. Electrical resistivity indicated that all the compounds are semiconducting nature. (C) 2009 Elsevier B.V. All rights reserved.

10aMagnetic measurements10aSintering10atransmission electron microscopy10aX-ray diffraction1 aHankare, P., P.1 aSankpal, U., B.1 aPatil, R., P.1 aMulla, Imtiaz, S.1 aLokhande, P., D.1 aGajbhiye, N., S. uhttps://library.ncl.res.in/content/synthesis-and-characterization-cocrxfe2-xo4-nanoparticles-002272nas a2200253 4500008004100000022001400041245007000055210006900125260009200194300001000286490000600296520136500302653002101667653003001688653004101718100002301759700001901782700002201801700001801823700002101841700003001862700002201892856010401914 2009 eng d a1947-293500aSynthesis of Sb-doped SnO2 nanowires and hyperbranched structures0 aSynthesis of Sbdoped SnO2 nanowires and hyperbranched structures a26650 THE OLD RD, STE 208, VALENCIA, CA 91381-0751 USAbAMER SCIENTIFIC PUBLISHERScAPR a38-430 v13 a

Branched nanostructures of semiconducting materials are of great interest for their potential applications in optoelectronic, photonic devices and sensors. We herein describe a facile single-step chemical vapor deposition route for the synthesis of Sb-SnO2 hyperbranched nanostructures comprised of elongated nanowires with 30-40 nm diameter and 10-20 Am length. The morphology and structure has been characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), selective area electron diffraction (SAED), and powder X-ray diffraction (XRD). Also, a possible mechanism is proposed for the growth of nanowires into the hyperbranched form on the basis of the substrate effect, the role of Au nanoparticles, and the effect of Sb doping on specific morphology evolution. Interestingly, electrical conductivity measurements as a function of temperature suggest a semiconducting behavior, despite being governed by different electron-transport mechanisms with activation energies of 0.55 and 0.17 eV, which correspond to pure SnO2 and Sb-SnO2 nanowires, respectively. A precise control over the operating parameters not only envisages custom-designed, branched structures by a simple and economical route but also offers an alternative method to the expensive and tedious nanofabrication techniques for industrial applications.

10aAu Nanoparticles10achemical vapor deposition10aSb-SnO2 Hyperbranched Nanostructures1 aSathe, Bhaskar, R.1 aPatil, Mrudula1 aWalke, Pravin, S.1 aVivek, J., P.1 aLele, Ashish, K.1 aPillai, Vijayamohanan, K.1 aMulla, Imtiaz, S. uhttps://library.ncl.res.in/content/synthesis-sb-doped-sno2-nanowires-and-hyperbranched-structures-001713nas a2200217 4500008004100000022001400041245009600055210006900151260007300220300001400293490000800307520090000315653003601215653002201251653001601273100002501289700002101314700002201335700001901357856011901376 2010 eng d a0169-433200aSwitching of hydrophilic to ultra hydrophilic properties of flower-like gold nanostructures0 aSwitching of hydrophilic to ultra hydrophilic properties of flow aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcAPR a4192-41950 v2563 a

Flower-like morphologies of gold nanostructures were obtained via chemical method by controlling molar concentration ratio of reducing agent and precursor. Chloroauric acid was used as a metal precursor while tri-sodium citrate as the reducing agent. These flower-like structures were characterized by UV-vis spectroscopy, Scanning Electron Microscopy (SEM) and X-ray Diffraction (XRD) techniques. The basic crystallite size calculated via XRD measurement was found to be similar to 10 nm and remain unaffected by the different concentration ratios. The coating of these structures was made over clean glass substrate and analyzed for wettability by measuring their water contact angles. Our analysis indicates that the coatings of hierarchical flower-like structures of gold are able to provide ultra hydrophilic properties to glass substrate. (C) 2010 Elsevier B.V. All rights reserved.

10aGold flower-like nanostructures10aUltra hydrophilic10aWettability1 aDhumale, Vinayak, A.1 aShah, Preeti, V.1 aMulla, Imtiaz, S.1 aSharma, R., B. uhttps://library.ncl.res.in/content/switching-hydrophilic-ultra-hydrophilic-properties-flower-gold-nanostructures-001812nas a2200265 4500008004100000022001400041245008700055210006900142260006900211300001200280490000800292520091300300653002401213653001301237653001401250653002201264100002001286700002001306700001801326700002201344700001701366700002101383700002101404856012101425 2010 eng d a0925-838800aSynthesis and characterization of nanocrystalline zinc substituted nickel ferrites0 aSynthesis and characterization of nanocrystalline zinc substitut aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcAPR a256-2600 v4963 a

Nanocrystalline zinc substituted nickel ferrites, Ni(1-x)Zn(x)Fe(2)O(4) (0.0 <= x <= 1.0) have been prepared by citrate gel auto-combustion method. The effect of zinc ion content on structural, electrical transport and magnetic properties has been studied. The X-ray diffraction (XRD) pattern revealed that, all the compositions possess single-phase spinel structure. The nano-sized grain structure formation was confirmed by transmission electron microscopy (TEM). The dc electrical resistivity shows the samples are semiconducting in nature. The magnetic measurements showed that the composition Ni(0.6)Zn(0.4)Fe(2)O(4) has maximum saturation magnetization (M(s)) while high coersivity (Hc) for ZnFe(2)O(4). Thermoelectric power measurement study showed that the compounds, with x <= 0.4 are p-type and for x > 0.4 behaves n-type conduction mechanism. (C) 2010 Published by Elsevier B.V.

10aElectron microscopy10aMagnetic10aSintering10aX-ray diffraction1 aHankare, P., P.1 aSankpal, U., B.1 aPatil, R., P.1 aMulla, Imtiaz, S.1 aSasikala, R.1 aTripathi, A., K.1 aGaradkar, K., M. uhttps://library.ncl.res.in/content/synthesis-and-characterization-nanocrystalline-zinc-substituted-nickel-ferrites-001635nas a2200253 4500008004100000022001400041245009400055210006900149260006900218300001200287490000800299520075400307653001901061653001901080653001501099653002201114100002001136700001901156700002101175700001801196700002201214700002001236856012501256 2010 eng d a0925-838800aSynthesis and characterization of nickel selenide thin films deposited by chemical method0 aSynthesis and characterization of nickel selenide thin films dep aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcFEB a228-2310 v4903 a

Nickel selenide thin films have been deposited using chemical bath method on non-conducting glass substrates in a tartarate bath containing nickel sulphate octahydrate, hydrazine hydrate, sodium seleno-sulphate in an aqueous alkaline medium. The grown films were uniform, well adherent and black in color. The films were characterized using X-ray diffraction, scanning electron microscopy, optical absorption and electrical measurements. The nickel selenide thin film revealed polycrystalline nature with hexagonal system. The direct optical band gap of the film was found to be 1.61 eV. Electrical resistivity of film was observed in the order of 10(3) (Omega cm) with p-type conduction mechanism. (C) 2009 Elsevier B.V. All rights reserved.

10aCrystal growth10aSemiconductors10aThin films10aX-ray diffraction1 aHankare, P., P.1 aJadhav, B., V.1 aGaradkar, K., M.1 aChate, P., A.1 aMulla, Imtiaz, S.1 aDelekar, S., D. uhttps://library.ncl.res.in/content/synthesis-and-characterization-nickel-selenide-thin-films-deposited-chemical-method-001683nas a2200241 4500008004100000022001400041245009300055210006900148260006900217300001400286490000800300520082500308653002301133653001901156653002801175653001401203100002001217700001901237700001801256700001801274700002201292856012701314 2011 eng d a0925-838800aSynthesis and characterization of chemically deposited nickel substituted CdSe thin film0 aSynthesis and characterization of chemically deposited nickel su aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcFEB a2948-29510 v5093 a

The technologically important Cd(0.5)Ni(0.5)Se thin film has been developed by solution growth technique on non-conducting glass substrate in tartarate bath containing Cd(+2), Ni(+2) ions and sodium selenosulphate in an aqueous alkaline medium at room temperature. Various preparative conditions of the thin films are outlined. The films were characterized by X-ray diffraction, scanning electron microscope, optical absorption and electrical measurements. The X-ray diffraction study indicates that the film is polycrystalline in nature with hexagonal phase. Scanning electron micrograph shows that the film is homogeneous with well-defined grains. The films have high optical absorption coefficient. Thermoelectric power measurement shows p-type conduction mechanism. (C) 2010 Elsevier B.V. All rights reserved.

10aChemical synthesis10aCrystal growth10aElectrical conductivity10athin film1 aHankare, P., P.1 aJadhav, B., V.1 aChate, P., A.1 aSathe, D., J.1 aMulla, Imtiaz, S. uhttps://library.ncl.res.in/content/synthesis-and-characterization-chemically-deposited-nickel-substituted-cdse-thin-film-001740nas a2200205 4500008004100000022001400041245012100055210006900176260007400245300001400319490000700333520094800340100002001288700001801308700002001326700001801346700001901364700002201383856012901405 2011 eng d a0957-452200aSynthesis and characterization of cobalt substituted zinc ferri-chromites prepared by sol-gel auto-combustion method0 aSynthesis and characterization of cobalt substituted zinc ferric aVAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDSbSPRINGERcAUG a1109-11150 v223 a

Mixed metal oxides having spinel structure shows interesting structural properties. In the present investigation, cobalt substituted zinc ferri-chromites were prepared by sol-gel auto-combustion method. The completion of solid state reaction and the formation of spinel phase were identified using X-ray diffraction technique. All the compounds exhibit cubic spinel symmetry and lattice constant shows an irregular trend with substitution of Co. Infra-red spectral studies shows an two strong bands, one around 600 cm(-1) which is attributed to the intrinsic vibrations of tetrahedral complexes and the other at 400 cm(-1) is due to octahedral one. The morphology and size of the particles was found out by scanning electron microscopy while the elemental compositions by elemental dispersive X-ray spectroscopy. The various compounds of the present system Zn1-xCoxFeCrO4 were also investigated for their thermal and electronic studies.

1 aHankare, P., P.1 aVader, V., T.1 aSankpal, U., B.1 aPatil, R., P.1 aJadhav, A., V.1 aMulla, Imtiaz, S. uhttps://library.ncl.res.in/content/synthesis-and-characterization-cobalt-substituted-zinc-ferri-chromites-prepared-sol-gel-002050nas a2200277 4500008004100000022001400041245007300055210006900128260007300197300001400270490000700284520108200291653002401373653003701397653002901434653002101463653001301484653003101497100002501528700002401553700002101577700002601598700002201624700002201646856010401668 2011 eng d a0167-577X00aSynthesis of cube-shaped gold nanostructures by electron irradiation0 aSynthesis of cubeshaped gold nanostructures by electron irradiat aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJUN a1605-16070 v653 a

The needle-like gold nanostructures were synthesized by using chloroauric acid (HAuCl(4)) as a metal precursor and sodium borohydride (NaBH(4)) as the reducing agent. These needle-like nanostructures of gold were irradiated with high energy electrons (E-6 MeV, phi similar to 10(12) e cm(-2) s(-1)). The pre- and post-irradiated gold nanostructures were characterized by Scanning Electron Microscopy (SEM), UV-vis spectroscopy, X-ray Diffraction (XRD) and contact angle measurement (GBX-Model Digidrop) techniques. The results of the SEM revealed that after electron irradiation, the needle-like gold structures got fragmented into identical cube-shaped gold nanostructures, though of different sizes. The XRD analysis indicated that the average crystallite size of the gold nanostructures remained unchanged even after irradiation with high energy electrons. A glass surface showed hydrophilic behavior when coated with needle-like nanostructures and became ultra hydrophilic when coated with cube-shaped gold nanostructures. (C) 2011 Elsevier B.V. All rights reserved.

10aGold nanostructures10aHigh energy electron irradiation10aNanostructured materials10aRadiation damage10aSurfaces10aUltra hydrophilic surfaces1 aDhumale, Vinayak, A.1 aGangwar, Rajesh, K.1 aShah, Preeti, V.1 aBhoraskar, Vasant, N.1 aMulla, Imtiaz, S.1 aSharma, Rishi, B. uhttps://library.ncl.res.in/content/synthesis-cube-shaped-gold-nanostructures-electron-irradiation-001945nas a2200193 4500008004100000022001400041245011500055210006900170260011000239300001400349490000600363520114000369100002501509700002401534700002201558700002301580700002001603856012801623 2011 eng d a2040-336400aSynthesis of single crystalline CdS nanocombs and their application in photo-sensitive field emission switches0 aSynthesis of single crystalline CdS nanocombs and their applicat aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJAN a1078-10830 v33 a

Single crystalline CdS nanocombs were synthesized by a thermal evaporation route. The photo-sensitive field emission current shows a reproducible switching behavior, with a rise in current level of nearly five times the initial preset value of similar to 1 mu A. An ultra low turn-on field, required to draw an emission current density of similar to 0.1 mu A cm(-2) (100 nA), is found to be similar to 0.26 V mu m(-1) (260 V), which is much lower than the reported values for various other CdS nanostructures. Upon illumination with visible light the CdS nanocombs act as a photo field emission switch. At an applied field of similar to 0.65 V mu m(-1) the current densities are observed to be similar to 14.6 mu A cm(-2) and similar to 26.9 mu A cm(-2), without and with light illumination, respectively. The average emission current is seen to be stable over the duration of measurement for two preset values. The high sensitivity and fast response in the visible range indicates that the CdS nanocombs can be used as a photo-sensitive field emitting switch in device applications, and also in pulsed electron beam technology.

1 aChavan, Padmakar, G.1 aBadadhe, Satish, S.1 aMulla, Imtiaz, S.1 aMore, Mahendra, A.1 aJoag, Dilip, S. uhttps://library.ncl.res.in/content/synthesis-single-crystalline-cds-nanocombs-and-their-application-photo-sensitive-field-002049nas a2200229 4500008004100000022001400041245009900055210006900154260009900223300001400322490000700336520120000343653002401543653001801567653002001585653000901605100001801614700001801632700002201650700002401672856012301696 2012 eng d a0272-884200aStudies on the resistive response of nickel and cerium doped SnO2 thick films to acetone vapor0 aStudies on the resistive response of nickel and cerium doped SnO aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLANDbELSEVIER SCI LTDcDEC a6171-61790 v383 a

Undoped and Ni, Ce-doped nanocrystalline tin oxide were synthesized by co-precipitation route. Doped as well as undoped SnO2 compositions revealed single phase structure without any impurity. The lattice constant of SnO2 increases and the grain size decreases with doping of Ni and Ce. The responses of the sensing elements are evaluated by measuring the resistance change upon exposure to various test gases such as liquid petroleum gas (LPG), acetone, ethanol and ammonia. In comparison to LPG, ethanol, and ammonia the response towards acetone vapor increases markedly on simultaneous doping of Ni and Ce. For acetone vapors with 500 ppm at 300 degrees C, the undoped SnO2 shows 31% response, while with individual Ni or Ce doping it increases to 38 and 60%, respectively, however with simultaneous doping of Ni and Ce there is a significant enhancement up to 92%. The results of gas sensing measurements reveal that the thick films deposited on alumina substrates using screen printing technique give selectively a high response of (87%) with fast recovery (similar to 1 min) towards 100 ppm acetone at 300 degrees C. (c) 2012 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

10a(Ni plus Ce)-doping10aAcetone vapor10aScreen-printing10aSnO21 aBagal, L., K.1 aPatil, J., Y.1 aMulla, Imtiaz, S.1 aSuryavanshi, S., S. uhttps://library.ncl.res.in/content/studies-resistive-response-nickel-and-cerium-doped-sno2-thick-films-acetone-vapor-001025nas a2200169 4500008004100000020002200041245005600063210005500119260009200174520040100266653001800667100001400685700002000699700002200719700002400741856009000765 2016 eng d a978-1-5090-2419-300aSingle SnO2 Nanowire: field emission investigations0 aSingle SnO2 Nanowire field emission investigations a345 E 47th St, New York, NY 10017 USAbIEEE, 345 E 47th St, New York, NY 10017 USAcJUL3 a

The present work deals with the field emission study on multiple SnO2 nanowires synthesized by simple thermal evaporation method. For the realistic analysis of the Fowler Nordheim plot of the semiconducting SnO2, field emission behavior of a single nanowire is studied. A relevant model explaining the field emission mechanism from the single SnO2 nanowire is also proposed by the authors.

10aSnO2 nanowire1 aJoshi, D.1 aJoag, Dilip, S.1 aMulla, Imtiaz, S.1 aLate, Dattatray, J. uhttps://library.ncl.res.in/content/single-sno2-nanowire-field-emission-investigations01549nas a2200181 4500008004100000245008300041210006900124260000800193300001800201490000600219520090300225100003201128700002401160700002201184700002601206700002401232856011101256 2016 eng d00aSnS2 nanoflakes for efficient humidity and alcohol sensing at room temperature0 aSnS2 nanoflakes for efficient humidity and alcohol sensing at ro cOCT a105421-1054270 v63 aWe report a one step facile hydrothermal synthesis of layered SnS2 nanoflakes. The as-synthesized nanosheets are characterized using X-ray diffraction, Raman spectroscopy and Transmission Electron Microscopy (TEM). The humidity sensing behavior of SnS2 nanoflake sensor device were investigated in the range of 11-97% of relative humidity (RH) at room temperature. The response time of similar to 85 s and recovery time of similar to 6 s were observed for the SnS2 nanoflake based humidity sensor. A maximum sensitivity of 11.300% is recorded. We also investigate the SnS2 nanoflake based alcohol sensing properties towards methanol, ethanol and iso-propyl alcohol. An exclusive selectivity towards methanol with a response of 1580 is shown as compared to other analytes. The response time of similar to 67 s and recovery time of just 5 s were observed for the SnS2 nanoflake based methanol sensor.1 aBharatula, Lakshmi, Deepika1 aErande, Manisha, B.1 aMulla, Imtiaz, S.1 aRout, Chandra, Sekhar1 aLate, Dattatray, J. uhttps://library.ncl.res.in/content/sns2-nanoflakes-efficient-humidity-and-alcohol-sensing-room-temperature02490nas a2200217 4500008004100000245013500041210006900176260000900245300001600254490000700270520166700277100002401944700002101968700002601989700002702015700002602042700002302068700002202091700002802113856013102141 2025 eng d00aSurfactant-assisted tungsten oxide for enhanced acetone sensing and solar-driven photocatalysis: exploring the role of surfactants0 aSurfactantassisted tungsten oxide for enhanced acetone sensing a cAUG  a27895-279070 v153 a

Surfactants play a pivotal role in the kinetics of nucleation and accretion of nanoparticles in such a way that they serve as a template for the development of nanostructures, consequently influencing the morphology, dimensions, and other surface properties. Herein, we report the influence of cationic and anionic surfactants (CTAB, SDS, PVP and HMT) on the development of pristine WO3 nanostructures and their impact on gas sensing and photocatalytic properties of WO3. The various surfactant-assisted WO3 nanostructures were synthesized via a straightforward hydrothermal route and systematically analyzed using XRD, FESEM-EDAX, TEM/HRTEM, XPS, UV-Vis, and BET measurements. Gas sensing properties of various oxidizing and reducing gases revealed superior selectivity towards acetone. Among the various surfactant-assisted WO3, CTAB/WO3 exhibited an excellent response of 84.84% towards 100 ppm acetone at an optimal operating temperature of 300 degrees C. The CTAB/WO3 sensor exhibited a linear response to acetone at lower concentrations, showing a 4.8% response at 0.8 ppm, which delineates the threshold between healthy and diabetic breath acetone levels. At 1.8 ppm, the sensor recorded 8.1% response, aligning with diabetes values reported by National Institute for Occupational Safety and Health (NIOSH). Moreover, photocatalytic performance evaluations demonstrated a methylene blue degradation efficiency of 47.19% under natural solar irradiation. This work will motivate researchers in developing high performance acetone gas sensors and photocatalytic dye-degradation by the integration of appropriate surfactants in WO3 nanostructures.

1 aPatil, Abhijeet, P.1 aPatil, Suraj, S.1 aTamboli, Mohaseen, S.1 aDamkale, Shubhangi, R.1 aNadargi, Digambar, Y.1 aNadargi, Jyoti, D.1 aMulla, Imtiaz, S.1 aSuryavanshi, Sharad, S. uhttps://library.ncl.res.in/content/surfactant-assisted-tungsten-oxide-enhanced-acetone-sensing-and-solar-driven-photocatalysis