02208nas a2200205   4500008004100000022001400041245011100055210006900166260007100235300001400306490000800320520141000328100002601738700002301764700002401787700001801811700002901829700002001858856012401878       2010                        eng d  a1932-744700aObservation of photoconductivity in Sn-doped ZnO nanowires and their photoenhanced field emission behavior0 aObservation of photoconductivity in Sndoped ZnO nanowires and th  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcMAR  a3843-38490 v1143 a<p>Sn-doped ZnO nanowire films have been Successfully synthesized by electrodeposition oil zinc foil followed by annealing in air at 400 degrees C for 4 h. The XRD patterns of the annealed specimens exhibit I set of well-defined diffraction peaks indexed to the wurtzite phase of ZnO. The Surface morphology of the as-synthesized films showed a network of densely packed flakes/sheets oil the Substrate. However, upon annealing, the formation of ZnO nanowires, processing length in the range of several micrometers and diameter less than 150 nm, oil the entire substrate is observed. The relative atomic percentage of Sri, estimated from the energy dispersive spectra, was found to be 0.5 and 2.0 in the ZnO films deposited for 10 and 40 min durations, respectively. Front the field emission studies, the Values of the turn-on field and threshold field, required to draw emission Current density of 10 and 100 mu A/cm(2), are observed to be 0.68 and 1.1 V/mu m for 0.5% Sn-doped ZnO and 1.72 and 2.25 V/mu m for 2.0% Sn-doped ZnO, respectively. The field emission Current stability investigated for a duration Of h at the preset value of 100 mu A is found to be excellent. A prominent photoenhancement in the field emission Current upon visible light illumination of the Sn-doped ZnO nanowires films has been observed. This enhancement has been attributed to the photoconductivity of the Sn-doped ZnO.</p>1 aSheini, Farid, Jamali1 aMore, Mahendra, A.1 aJadkar, Sandesh, R.1 aPatil, K., R.1 aPillai, Vijaymohanan, K.1 aJoag, Dilip, S.  uhttps://library.ncl.res.in/content/observation-photoconductivity-sn-doped-zno-nanowires-and-their-photoenhanced-field-002834nas a2200217   4500008004100000022001400041245019800055210006900253260011000322300001400432490000700446520186700453100002502320700002602345700002102371700002502392700002402417700002302441700002202464856013002486       2012                        eng d  a0959-942800aOrganization of cubic CeO2 nanoparticles on the edges of self assembled tapered ZnO nanorods via a template free one-pot synthesis: significant cathodoluminescence and field emission properties0 aOrganization of cubic CeO2 nanoparticles on the edges of self as  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcMAR  a8887-88950 v223 a<p>The present investigation explores the controlled architecture of a CeO2-ZnO nanocomposite via a template-free, low temperature, facile single step solvothermal approach. This complex architecture depicts cubic single crystalline CeO2 nanoparticles (size similar to 15 nm) grown on the edges of tapered ZnO nanorods with definite orientations and alignments. The formation of wurtzite ZnO, cubic CeO2 and the coexistence of Ce3+ and Ce4+ on the surface of the CeO2-ZnO nanocomposites are confirmed using various characterization tools. The finding of such unique nanostructures by a facile method is exemplified by a plausible growth mechanism. Surprisingly, the aqueous mediated ultrasonication reaction conferred the formation of crystalline ZnO nanotubes of diameter similar to 50 nm. Spatially resolved cathodoluminescence spectra are obtained by linearly scanning an individual CeO2-ZnO nanorod along its length, which reveals the size-dependent surface effects. Interestingly, such hybrid CeO2-ZnO nanoarchitecture is observed to exhibit enhanced field emission properties, demonstrating better current stability as compared to other ZnO nanostructures. This is attributed mainly to strong surface interactions between the Ce-ionic species and the ZnO nanorods. Herein, a soft-chemical approach is used for the first time to architect a binary oxide nanostructure, which is otherwise accomplished using high temperature techniques, as reported elsewhere. Also, the present work not only gives insight into understanding the hierarchical growth behaviour of the CeO2-ZnO nanocomposite in a solution phase synthetic system, but also provides an efficient route to enhance the field emission performance of ZnO nanostructures, which could be extended to other potential applications, such as chemical sensors, optoelectronic devices and photocatalysts.</p>1 aWarule, Sambhaji, S.1 aChaudhari, Nilima, S.1 aKale, Bharat, B.1 aPatil, Kashinath, R.1 aKoinkar, Pankaj, M.1 aMore, Mahendra, A.1 aMurakami, Ri-ichi  uhttps://library.ncl.res.in/content/organization-cubic-ceo2-nanoparticles-edges-self-assembled-tapered-zno-nanorods-template-001452nas a2200157   4500008004100000245009700041210006900138260008100207300001000288520076900298100002801067700002301095700002301118700002401141856012901165       2015                        eng d00aOne-pot thermal evaporation synthesis of CdS-RGO hetrostructure and its field emission study0 aOnepot thermal evaporation synthesis of CdSRGO hetrostructure an  aGuangzhou, Peoples R ChinabIEEE, 345 E 47th ST, New York, NY 10017 USAcJUL  a82-833 a<p>CdS-RGO heterostructure was synthesized by thermal evaporation method. The as-synthesized CdS-RGO heterostructure was characterized using X-ray Diffraction, SEM, and EADX, before field emission (FE) studies. The FE characteristics of a planar emitter made up of as-synthesized CdS-RGO heterostructures were measured at the base pressure 1x10(-8) mbar. The synthesized CdS-RGO heterostructure emitter is found to deliver a current density similar to 70 mu A/cm(2) at an applied electric field of similar to 4.7 V/mu m. Moreover, the nanocomposite shows excellent emission stability without significant current degradation making CdS-RGO heterostructure as a promising electron source for practical applications in various vacuum nano-microelectronic devices.</p>1 aBansode, Sanjeewani, R.1 aKhare, Ruchita, T.1 aMore, Mahendra, A.1 aLate, Dattatray, J.  uhttps://library.ncl.res.in/content/one-pot-thermal-evaporation-synthesis-cds-rgo-hetrostructure-and-its-field-emission-study02261nas a2200205   4500008004100000022001400041245007900055210006900134260005700203300000800260490000800268520152400276100002201800700002601822700002801848700002401876700002301900700002501923856010701948       2016                        eng d  a0947-839600aObservation of enhanced field emission properties of Au/TiO2 nanocomposite0 aObservation of enhanced field emission properties of AuTiO2 nano  a233 SPRING ST, NEW YORK, NY 10013 USAbSPRINGERcMAY  a5600 v1223 a<p>Simple and low-cost method of thermal annealing was used to decorate Gold (Au) nanoparticles on aligned TiO2 nanotubes. The aligned TiO2 nanotubes were decorated by Au nanoparticles with an average diameter of 9, 18 and 28 nm (aligned TiO2 nanotubes referred as specimen A and TiO2 nanotubes decorated by Au nanoparticles with average diameter of 9, 18 and 28 nm are referred as specimen B, C and D, respectively). The detailed characterization such as structural, morphological and elemental analysis of TiO2 and Au/TiO2 nanocomposite have been carried out using X-ray diffraction, field emission scanning electron microscope, transmission electron microscope, X-ray photoelectron spectroscopy and Raman spectroscopy. Furthermore, the meticulous comparative field emission characteristics of the aligned TiO2 nanotubes and Au/TiO2 nanocomposite have been performed. The turn-on field defined for the current density of 10 mu A/cm(2) has been found to be 3.9, 2.8, 3.2 and 3.7 V/mu m for specimen A, B, C and D, respectively. The observed low turn-on field of specimen B has been found to be superior than the other semiconducting nanocomposites reported in the literature. The emission current stability over a period of 3 h is found to be better for all the specimens. To the best of our knowledge, a systematic field emission study of Au/TiO2 nanocomposite has not been explored. The observed superior field emission study of Au/TiO2 nanocomposite indicates their possible use in micro/nanoelectronic devices.</p>1 aPatil, Girish, P.1 aBagal, Vivekanand, S.1 aSuryawanshi, Sachin, R.1 aLate, Dattatray, J.1 aMore, Mahendra, A.1 aChavan, Padmakar, G.  uhttps://library.ncl.res.in/content/observation-enhanced-field-emission-properties-autio2-nanocomposite