01844nas 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-002716nas a2200229   4500008004100000022001400041245017200055210006900227260007100296300001600367490000600383520177500389653002002164653001702184653003002201653003402231653002302265100002302288700002402311700002402335856012702359       2015                        eng d  a1944-824400aSurface-tuned Co3O4 nanoparticles dispersed on nitrogen-doped graphene as an efficient cathode electrocatalyst for mechanical rechargeable zinc-air battery application0 aSurfacetuned Co3O4 nanoparticles dispersed on nitrogendoped grap  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcSEP  a21138-211490 v73 a<p>The most vital component of the fuel cells and metal air batteries is the electrocatalyst, which can facilitate the oxygen reduction reaction (ORR) at a significantly reduced overpotential. The present work deals with the development of surface-tuned cobalt oxide (Co3O4) nanoparticles dispersed on nitrogen-doped graphene as a potential ORR electrocatalyst possessing some unique advantages. The thermally reduced nitrogen-doped graphene (NGr) was decorated with three different morphologies of Co3O4 nanoparticles, viz., cubic, blunt edged cubic, and spherical, by using a simple hydrothermal method. We found that the spherical Co3O4 nanoparticle supported NGr catalyst (Co3O4-SP/NGr-24h) has acquired a significant activity makeover to display the ORR activity closely matching with the state-of-the-art Pt supported carbon (PtC) catalyst in alkaline medium. Subsequently, the Co3O4-SP/NGr-24h catalyst has been utilized as the air electrode in a Zn-air battery, which was found to show comparable performance to the system derived from PtC. Co3O4-SP/NGr-24h catalyst has shown several hours of flat discharge profile at the discharge rates of 10, 20, and 50 mA/cm(2) with a specific capacity and energy density of similar to 590 mAh/g(-zn) and,840 Wh/kg(-zn), respectively, in the primary Zn-air battery system. In conjunction, Co3O4-SP/NGr-24h has outperformed as an air electrode in mechanical rechargeable Zn-air battery as well, which has shown consistent flat discharge profile with minimal voltage loss at a discharge rate of 50 mA/cm(2). The present results, thus demonstrate that the proper combination of the tuned morphology of Co3O4 with NGr will be a promising and inexpensive material for efficient and ecofriendly cathodes for Zn-air batteries.</p>10aelectrocatalyst10amixed facets10aoxygen reduction reaction10arechargeable zinc-air battery10asurface morphology1 aSingh, Santosh, K.1 aDhavale, Vishal, M.1 aKurungot, Sreekumar  uhttps://library.ncl.res.in/content/surface-tuned-co3o4-nanoparticles-dispersed-nitrogen-doped-graphene-efficient-cathode-0