01682nas a2200277   4500008004100000022001400041245004800055210004800103260006900151300001400220490000800234520082400242653001901066653002001085653003301105653001401138100002201152700002401174700002301198700002301221700001901244700002001263700002001283700002101303856008001324       2006                        eng d  a0040-609000aField emission from oriented tin oxide rods0 aField emission from oriented tin oxide rods  aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcDEC  a1450-14540 v5153 a<p>Tin oxide (SnO2) films were grown on silicon substrates by a wet chemical route. It was found from scanning electron microscopy investigations that oriented SnO2 rods normal to the substrates were obtained. Field emission studies were carried out in diode configuration in an all metal ultra high vacuum chamber at a base pressure similar to 1.33 x 10(-8) mbar. The `onset' field required to draw 0.1 mu A/cm(2) current density from the emitter cathode was found to be similar to 3.4 V/mu m for SnO2 rods. The field emission current and applied field follows the Folwer-Nordheim relationship in low field regime. The observed results indicate that the field emission characteristics of chemically grown SnO2 structures are comparable to the vapor grown nanostructures. (c) 2006 Elsevier B.V. All rights reserved.</p>10afield emission10amicrostructures10ascanning electron microscopy10atin oxide1 aDeshpande, A., C.1 aKoinkar, Pankaj, M.1 aAshtaputre, S., S.1 aMore, Mahendra, A.1 aGosavi, S., W.1 aGodbole, P., D.1 aJoag, Dilip, S.1 aKulkarni, S., K.  uhttps://library.ncl.res.in/content/field-emission-oriented-tin-oxide-rods-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-002128nas a2200277   4500008004100000022001400041245007700055210006900132260008800201300001200289490000700301520119600308653001701504653001401521653002301535653002501558653002801583100001701611700002001628700002401648700001801672700001701690700001601707700001901723856010801742       2015                        eng d  a0217-984900aBiosynthesis of silver nanoparticles by using ganoderma-mushroom extract0 aBiosynthesis of silver nanoparticles by using ganodermamushroom   a5 TOH TUCK LINK, SINGAPORE 596224, SINGAPOREbWORLD SCIENTIFIC PUBL CO PTE LTDcMAR  a15400470 v293 a<p>Present study reports the biochemical synthesis of silver nanoparticles (Ag-NPs) from aqueous medium by using the extract of medicinal mushroom Ganoderma, as a reducing and stabilizing agents. The Ag-NPs are prepared at room temperature by the reduction of Ag+ to Ag in aqueous solution of AgNO3. The resultant particles are characterized by using UV-visible spectroscopy, Fourier transform infrared (FTIR) spectroscopy and transmission electron microscopy (TEM) measurement techniques. The formation of Ag-NPs is confirmed by recording the UV-visible absorption spectra for surface plasmon resonance (SPR) where peak around 427 nm. The prominent changes observed in FTIR spectra supported the reduction of Ag+ to Ag. The morphological features of Ag-NPs are evaluated from HRTEM. The spherical Ag-NPs are observed in transmission electron microscopy (TEM) studies. The particle size distribution is found to be nearly uniform with average particle size of 2 nm. The Ag-NPs aged for 15, 30, 60 and 120 days showed no profound effect on the position of SPR peak in UV-visible studies, indicating the protecting/capping ability of medicinal mushroom Ganoderma in the synthesis of AgNPs.</p>10aBiosynthesis10aGanoderma10amedicinal mushroom10asilver nanoparticles10aUV-visible spectroscopy1 aEkar, S., U.1 aKhollam, Y., B.1 aKoinkar, Pankaj, M.1 aMirji, S., A.1 aMane, R., S.1 aNaushad, M.1 aJadhav, S., S.  uhttps://library.ncl.res.in/content/biosynthesis-silver-nanoparticles-using-ganoderma-mushroom-extract-1