02494nas a2200277 4500008004100000022001400041245011500055210006900170260010600239300001600345490000700361520148700368653001501855653001201870653002401882653001701906653001901923100002401942700002201966700001801988700002302006700002102029700001802050700001702068856013102085 2011 eng d a0360-319900aSurfactant tunable hierarchical nanostructures of CdIn2S4 and their photohydrogen production under solar light0 aSurfactant tunable hierarchical nanostructures of CdIn2S4 and th aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcSEP a11628-116390 v363 a

The hierarchical nanostructures of CdIn2S4 were selectively prepared through hydrothermal process in the presence of different surfactants. Structural study demonstrated existence of cubic spinel structure and micro structural study shown a pretty marigold flower like morphology without any surfactant. The effect of surfactants on the morphology and microstructure of CdIn2S4 has been studied by using Polyvinyl pyrrolidone (PVP) and Cetyltrimethyl ammonium bromide (CTAB) as a surfactants. The CdIn2S4 bipyramids with length of 0.7-1 mu m have been obtained using PVP. Interestingly, the nanopetals (thin and transparent) of CdIn2S4 are self assembled into hollow spheres in the presence of CTAB. Considering the importance of these unique nanostructures, the growth mechanism has also been proposed. The optical properties demonstrated the band gap in the range of 2.12-2.29 eV which is well within the visible region. In this contest, photocatalytic activity for hydrogen production using the above nanostructures under visible light was also demonstrated. The prima-fascia observations shows that the bipyramidal CdIn2S4 exhibit excellent photocatalytic activity for hydrogen production (3238 mu molh(-1)) than other nanostructures. Being a nanostructured semiconductor chalcogenide with a good stability will also have potential applications in solar cells and LED. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

10aBipyramids10aCdIn2S410aHydrogen generation10ahydrothermal10aSelf-assembled1 aBhirud, Ashwini, P.1 aChaudhari, Nilima1 aNikam, Latesh1 aSonawane, Ravindra1 aPatil, Kashinath1 aBaeg, Jin-Ook1 aKale, Bharat uhttps://library.ncl.res.in/content/surfactant-tunable-hierarchical-nanostructures-cdin2s4-and-their-photohydrogen-production-002658nas a2200313 4500008004100000022001400041245010900055210006900164260007400233300002600307490000700333520156000340653001801900653001501918653001901933653002201952653001801974653002801992100002202020700002102042700002202063700002002085700001802105700002302123700001702146700002202163700002902185856013002214 2013 eng d a1388-076400aHollow nanogold/meso-magnetite composite: pulsed laser synthesis, properties, and biosensing application0 aHollow nanogoldmesomagnetite composite pulsed laser synthesis pr aVAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDSbSPRINGERcNOV aArticle No. UNSP 20810 v153 a

A facile and template-free UV (Excimer) laser photolysis process is demonstrated to transform a Fe-complex into unique hollow Fe3O4 nanosphere morphology with each sphere having nanometric pores and an opening. Depending on the Fe-complex concentration and processing time interesting configurations are seen to evolve. When an identical process is applied to a mixture of Fe-complex and chloroauric acid an enthrallingly decorated Au-Fe3O4 nanostructure evolves, with Au nanoparticles surface-loaded on mesospheric Fe3O4. This room temperature process implemented under normal laboratory conditions is clearly versatile and applicable to heterojunction nanomaterials synthesis in a single-step process. The potential application of these gold-decorated magnetic nanostructures was also investigated for immuno-magnetic capture of E. coli in biosensing and these were found to be sensitive even below 1,000 cfu/ml. The test results demonstrate linear sensing response in the range of 10(3)-10(5) cfu/ml. We also show that these nanostructures can be used for simple electrical conductivity-based biosensing since they show dramatic conductivity change in a simple drop-cast test. A new laser-based approach to the synthesis of unique hollow sphere morphology of magnetite (Fe3O4) without and with Au nanoparticle decoration is presented. The potential application of these gold-decorated magnetic nanostructures was also investigated for immuno-magnetic capture of E. coli in biosensing and these were found to be sensitive even below 1,000 cfu/ml.

10aE. coli cells10aFe-complex10aMeso-magnetite10aNanobiotechnology10aNanocomposite10aPulse laser irradiation1 aChaudhari, Nilima1 aWarule, Sambhaji1 aAgrawal, Shailaja1 aThakare, Vishal1 aJouen, Samuel1 aHannoyer, Beatrice1 aKale, Bharat1 aPaknikar, Kishore1 aOgale, Satishchandra, B. uhttps://library.ncl.res.in/content/hollow-nanogoldmeso-magnetite-composite-pulsed-laser-synthesis-properties-and-biosensing-002536nas a2200193 4500008004100000022001400041245012000055210006900175260007100244300001600315490000800331520175800339100002302097700001302120700002202133700002402155700003202179856013102211 2014 eng d a1932-744700aMagnetic alignment of gamma (core)-alpha (shell) Fe2O3 nanorods in a solid polymer electrolyte for Li-Ion batteries0 aMagnetic alignment of gamma corealpha shell Fe2O3 nanorods in a  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcAUG a18836-188450 v1183 a

The temperature-dependent ionic conductivity and thermal properties are characterized for a solid polymer electrolyte of poly(ethylene oxide) (PEO) and LiClO4 filled with 1 wt % gamma-phase core (maghemite) and alpha-phase shell (hematite) Fe2O3 nanorods. Samples are solvent-cast in the absence and presence of a 0.5 T magnetic field, dried at room temperature under vacuum for 72 h, and measured under nitrogen. Vibrating sample magnetometry indicates that the magnetic treatment aligns the nanorods to some extent in the desired orientation normal to the electrode surface. For samples with an ether oxygen to lithium ratio (EO/Li) of 10:1, the nanorods induce sample-to-sample variability in the ionic conductivity. The magnetic treatment eliminates this variability, and differential scanning calorimetry data support the observation that the magnetic treatment increases the structural homogeneity of the electrolyte. For samples with an EO/Li of 3:1, the ionic conductivity is 3 orders of magnitude larger for samples containing 5 times more of the crystal structure, (PEO)(6)/LiClO4. This result is surprising because an inverse relationship between crystallinity and conductivity is normally observed for semicrystalline, solid polymer electrolytes. When the crystal fraction is increased by a factor of 8 via the combination of nanorods and magnetic treatment, the conductivity does not continue to increase, showing that the effect does not persist beyond a critical fraction of (PEO)(6)/LiClO4. The results demonstrate that field-effect alignment of magnetic nanorods increases the crystal fraction and homogeneity of PEO/LiClO4, but does not affect the ionic conductivity in the range of salt and nanorod concentrations investigated.

1 aSchaetzl, Dean, M.1 aLi, Peng1 aChaudhari, Nilima1 aBernstein, Gary, H.1 aFullerton-Shirey, Susan, K. uhttps://library.ncl.res.in/content/magnetic-alignment-gamma-core-alpha-shell-fe2o3-nanorods-solid-polymer-electrolyte-li-ion-0