01848nas a2200253   4500008004100000022001400041245009400055210006900149260006900218300001200287490000700299520095400306653002301260653002501283653001901308653001201327100001901339700001601358700002701374700002301401700001601424700002901440856012501469       2005                        eng d  a0254-058400aPVA stabilized gold nanoparticles by use of unexplored albeit conventional reducing agent0 aPVA stabilized gold nanoparticles by use of unexplored albeit co  aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcJUL  a229-2330 v923 a<p>Poly(vinyl alcohol) (PVA) stabilized gold nanoparticles have been prepared in aqueous medium using two different reducing viz.; hydrazine hydrate, a stronger reducing agent and sodium formaldehydesulfoxylate (SFS), a slightly weaker reducing agent. SFS is used for first ever time for reduction of gold metal salt. The PVA stabilized gold nanoparticles solutions are wine red to blood red coloured and are stable over a long period of time with no indication of aggregation. The solution shows strong visible light absorptions in the range of 520-540 nm, characteristics of gold nanoparticles. Powder X-ray diffraction patterns of freshly prepared films containing gold nanoparticles indicated particles size to be about 15 nm. Transmission electron microscopy (TEM) of a more than two-week-old sample revealed well-defined non-agglomerated spherical particles of about 50 nm diameter in solutions. (c) 2005 Elsevier B.V. All rights reserved.</p>10aChemical synthesis10aelectronic materials10aNanostructures10aPolymer1 aKhanna, P., K.1 aGokhale, R.1 aSubbarao, V., V. V. S.1 aVishwanath, A., K.1 aDas, B., K.1 aSatyanarayana, C., V. V.  uhttps://library.ncl.res.in/content/pva-stabilized-gold-nanoparticles-use-unexplored-albeit-conventional-reducing-agent-001625nas a2200241   4500008004100000022001400041245009800055210006900153260006900222300001000291490000700301520079500308653002301103653002501126653001401151653001801165100001901183700001901202700001301221700001501234700001801249856011601267       2005                        eng d  a0254-058400aSynthesis of fine PbE (E = S, Se) powder from direct in situ reduction of sulphur or selenium0 aSynthesis of fine PbE E S Se powder from direct in situ reductio  aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcSEP  a91-940 v933 a<p>Lead sulphide and lead selenide have been prepared for the first time, by in situ reduction of elemental S or Se by using aqueous DMF or aqueous SFS as reducing agents and their reaction with lead acetate. The grayish-black powder has been characterized by powder XRD measurement, XPS and SEM/EDAX analysis. Powder X-ray diffraction pattern revealed that cubic PbE (E = S, Se) is formed with a little impurities of lead in case of PbSe. Slightly broader peaks in XRD measurement suggest small particles diameter in the powder. The particle size by using Scheffer's formula is found to be about 100 nm. Peaks due to free lead particles are observed in XPS and EDS (in case of PbSe) analysis and SEM analysis indicates agglomerated particles. (c) 2005 Elsevier B.V All rights reserved.</p>10aChemical synthesis10aelectronic materials10areduction10aSemiconductor1 aKhanna, P., K.1 aSubbarao, VVVS1 aWagh, M.1 aJadhav, P.1 aPatil, K., R.  uhttps://library.ncl.res.in/content/synthesis-fine-pbe-e-s-se-powder-direct-situ-reduction-sulphur-or-selenium-001958nas a2200229   4500008004100000022001400041245011700055210006900172260009200241300001400333490000600347520110700353653002301460653002001483653001601503653000801519100002001527700002001547700001901567700001801586856012401604       2006                        eng d  a1533-488000aDirect synthesis of nanocrystalline silver from the reaction between silver carboxylates and n-trioctylphosphine0 aDirect synthesis of nanocrystalline silver from the reaction bet  a26650 THE OLD RD, STE 208, VALENCIA, CA 91381-0751 USAbAMER SCIENTIFIC PUBLISHERScJUL  a2095-21020 v63 a<p>Neat n-Trioctylphosphine (TOP) has been used for the first ever time for reduction of silver nitrate and silver carboxylates (citrate, oleate, and myristate) under mild thermal reaction conditions. UV-visible absorption measurements of re-dispersible silver particles that were obtained by reduction of silver myristrate (product-IV) and silver nitrate (product-I) showed surface plasmon resonance absorption peak at 400 nm. The powder XRD pattern of fcc zero-valent silver resulted in diameters in the range of about 25-30 nm. TEM analysis showed particle diameter similar to that was observed by the XRD. FTIR spectroscopy revealed that the organics from the carboxylate group are retained by the nano-particles in case of product-IV however, presence of TOP is observed in product-I. It is found that when silver nitrate is reduced by TOP, spherical silver nano-particles with poor redispersity are formed but extended heating results in formation of long silver rods of micrometer size however, the re-dispersible nano-particles are easily formed when silver carboxylates are reduced by TOP.</p>10aChemical synthesis10aNanocrystalline10anoble metal10aXRD1 aCharan, Shobhit1 aSingh, Narendra1 aKhanna, P., K.1 aPatil, K., R.  uhttps://library.ncl.res.in/content/direct-synthesis-nanocrystalline-silver-reaction-between-silver-carboxylates-and-n-001952nas a2200229   4500008004100000022001400041245014000055210006900195260007300264300001400337490000700351520108200358653002301440653001601463653003001479653001801509100001901527700001401546700002001560700001801580856012401598       2006                        eng d  a0167-577X00aSynthesis of beta-Ag2Se from organo-selenium precursor and silver nitrate in DMF via simultaneous reduction of selenium and silver salt0 aSynthesis of betaAg2Se from organoselenium precursor and silver   aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcAUG  a2080-20850 v603 a<p>Reaction of selenium powder and silver nitrate in aqueous N,N'-dimethylformamide (aq. DMF) leads to formation of silver selenide. Similar reaction with cycloalkeno-1,2,3-selenadiazole an organic compound of selenium upon thermolysis, also produces silver selenide. It is believed that DMF activates selenium and reduces silver salt via in-situ generated hydrogen ion simultaneously. Slightly broadened X-ray diffraction pattern for pure beta silver selenide (beta-Ag2Se) was observed. Scanning electron microscopy (SEM) indicated that the agglomerated particles could be in the range of about 100 to 200 nm in dimension. EDAX analysis showed non-stoichiometric elemental ratio between silver and selenium. It is found that the weight percent of Ag is slightly higher than Se. However, free amorphous selenium is also detected by XPS analysis when the product is made by use of elemental selenium. Thermal analysis (TGA) revealed a small (4%) weight loss due to the presence of organics or the solvent from the reaction medium. (c) 2005 Elsevier B.V. All rights reserved.</p>10aChemical synthesis10anano powder10anoble metal chalcogenides10aSemiconductor1 aKhanna, P., K.1 aSingh, N.1 aCharan, Shobhit1 aPatil, K., R.  uhttps://library.ncl.res.in/content/synthesis-beta-ag2se-organo-selenium-precursor-and-silver-nitrate-dmf-simultaneous-002131nas a2200241   4500008004100000022001400041245010800055210006900163260007300232300001400305490000700319520127900326653002301605653001801628653001801646653000801664100002001672700002001692700001801712700002201730700001901752856011801771       2006                        eng d  a0167-577X00aUnusual formation of nano-particles of CdO and Cd(OH)(2) from the reaction of dimethyl cadmium with DMF0 aUnusual formation of nanoparticles of CdO and CdOH2 from the rea  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcDEC  a3492-34980 v603 a<p>This paper presents generation of CdO and Cd(OH)(2) nano-particles from Dimethyl Cadmium in DMF. The CdO nano-particles were obtained instead of CdSe, even when the reaction was done in presence of 1,2,3-selenadiazole (the source of selenium) with Me2Cd in DMF (product-I). The direct reaction of Me2Cd in DMF also leads to formation of CdO (product-II). However, Cd(OH)(2) nano-particles were obtained when Me2Cd was refluxed in DMF for a few hours followed by reaction of H2S gas (product-III). The formation of Cd(OH)(2) was also established via decomposition Of Me2Cd:Et2O adduct (product-IV). Nano-particles of CdO and Cd(OH)(2) (product-I to product-IV) were characterized by X-ray powder diffraction (XRD), TEM and SEM/EDS measurements, FTIR, thermal analysis (TGA) and XPS analysis. The particle size of all the products as calculated by XRD patterns were in the range of about 20 nm. TEM images showed that the products are agglomerated clusters with the particles in the nano-meter regime. The synthesis however, is understood to be unusual as the reactions with selenium source and sulfur source should have generated the CdSe and CdS however, the end products were always found to be the product-I to product-IV (c) 2006 Elsevier B.V. All rights reserved.</p>10aChemical synthesis10aNanoparticles10aSemiconductor10aXRD1 aSingh, Narendra1 aCharan, Shobhit1 aPatil, K., R.1 aViswanath, A., K.1 aKhanna, P., K.  uhttps://library.ncl.res.in/content/unusual-formation-nano-particles-cdo-and-cdoh2-reaction-dimethyl-cadmium-dmf-002051nas a2200277   4500008004100000022001400041245009600055210006900151260008600220300001200306490000700318520111200325653001001437653002301447653001601470653001601486653002101502100001901523700001401542700001701556700001801573700002001591700001801611700001701629856012701646       2007                        eng d  a1553-317400aOne-step preparation of nanosized Ag-PdCo-powder and its alloy formation at low temperature0 aOnestep preparation of nanosized AgPdCopowder and its alloy form  a325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USAbTAYLOR & FRANCIS INCcSEP  a531-5390 v373 a<p>Nano-sized silver-palladium co-powder has been synthesized from silver nitrate-palladium chloride by wet chemical method. The present experimental conditions are applied for the first time for Ag-Pd co-powders wherein sodium formaldehyde sulfoxylate (SFS) has been used as an external reducing agent to simultaneously reduce respective metal salts. SFS reduces the metal salts at room temperature thus prevents formation of bigger particles of the respective metals in co-powder. Powder X-ray diffraction measurements ( XRD) and Transmission electron microscopy ( TEM) suggest the formation of nano-sized Ag-Pd co-powder with particle diameter in the range of about 25 nm. SEM shows that the powder morphology changes with temperature. Heat treatment of 90: 10 (Ag:Pd) composition showed shift in XRD peaks indicating alloy formation of Ag/Pd at lower temperature. Thick-films generated by use of the co-powder resulted in Ag/Pd alloy at about 500 degrees C as confirmed by the XRD. Thermal analysis showed that Ag/Pd co-powders initially gain the weight due to oxidation followed by the weight loss.</p>10aalloy10aChemical synthesis10anano-powder10anoble metal10aTransition Metal1 aKhanna, P., K.1 aSingh, N.1 aKulkarni, D.1 aMarimuthu, R.1 aCharan, Shobhit1 aPatil, K., R.1 aJain, G., H.  uhttps://library.ncl.res.in/content/one-step-preparation-nanosized-ag-pdco-powder-and-its-alloy-formation-low-temperature-001969nas a2200241   4500008004100000022001400041245009300055210006900148260006900217300001000286490000800296520112200304653002301426653002501449653001101474653001801485100001901503700002101522700002001543700001801563700002901581856011701610       2008                        eng d  a0254-058400aSynthesis of oleic acid capped copper nano-particles via reduction of copper salt by SFS0 aSynthesis of oleic acid capped copper nanoparticles via reductio  aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcJUL  a21-250 v1103 a<p>Synthesis of oleic acid capped copper nano-particles has been carried out by use of sodium formaldehyde sulfoxylate (SFS) in aqueous medium. Nano-copper can be effectively coated with polyvinyl alcohol (PVA). Phase-pure nano-Cu can be obtained when water/acetone was used as aqueous medium. It is observed that the surface plasmon resonance (SPR) phenomena can be controlled during synthesis by the use of suitable reagent system, e.g. absorption band in presence of PVA can be blue shifted. As-prepared copper nano-particles were characterized by X-ray diffraction measurements (XRD), Scanning electron microscopy (SEM), energy dispersive analysis of X-rays (EDAX), thermo gravimetric analysis (TGA) and Fourier transform infra-red spectroscopy (FTIR). XRD analysis revealed broad pattern for fcc crystal structure of copper metal. The particle size by use of Scherrer's equation was calculated to be about 20 nm. TGA revealed similar to 10% weight loss due to the presence of surfactant. FTIR spectroscopy confirmed the presence of oleic acid around the particles. (c) 2008 Elsevier B.V. All rights reserved.</p>10aChemical synthesis10aelectronic materials10ametals10aNanostructure1 aKhanna, P., K.1 aKale, Trupti, S.1 aShaikh, Mushtaq1 aRao, Koteswar1 aSatyanarayana, C., V. V.  uhttps://library.ncl.res.in/content/synthesis-oleic-acid-capped-copper-nano-particles-reduction-copper-salt-sfs-001799nas a2200229   4500008004100000022001400041245009900055210006900154260007400223300001200297490000700309520099100316653001901307653001901326653002501345653001401370653000801384100001401392700001901406700002501425856011901450       2009                        eng d  a1388-076400aSolid state synthesis and room temperature magnetic properties of iron phosphide nanoparticles0 aSolid state synthesis and room temperature magnetic properties o  aVAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDSbSPRINGERcFEB  a491-4970 v113 a<p>Room temperature magnetic properties have been achieved for nano-crystalline iron phosphide synthesized from the direct solid state reaction of iron chloride and tri-octylphosphine (TOP). The magnetization continuously increased with higher magnetic fields, indicating a super-paramagnetic behavior. It is observed that room temperature magnetism is possible for the material showing antiferromagnetic nature at low temperatures. In the present synthesis, TOP acted as a source of phosphorus as well as a surfactant. X-ray diffraction (XRD) studies revealed that the black powder is a mixture of FeP and Fe(2)P. Transmission electron microscopy (TEM) and scanning electron microscopy (SEM) showed elongated as well spherical particles. Energy dispersion X-ray analysis (EDAX) confirmed a non-stoichiometric iron phosphide. Presence of TOP was confirmed by infra-red (IR) spectroscopy, and thermo-gravimetric analysis (TGA) indicated about 6% wt. loss due to presence of organics.</p>10aIron phosphide10aSemiconductors10aSolid state reaction10asynthesis10aXRD1 aSingh, N.1 aKhanna, P., K.1 aJoy, Pattayil, Alias  uhttps://library.ncl.res.in/content/solid-state-synthesis-and-room-temperature-magnetic-properties-iron-phosphide-002040nas a2200241   4500008004100000022001400041245009700055210006900152260007400221300001200295490000700307520118300314653002301497653002201520653001901542653002001561100001901581700001901600700001801619700001801637700001801655856012501673       2010                        eng d  a1388-076400aOne-pot synthesis of oleic acid-capped cadmium chalcogenides (CdE: E = Se, Te) nano-crystals0 aOnepot synthesis of oleic acidcapped cadmium chalcogenides CdE E  aVAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDSbSPRINGERcJAN  a101-1090 v123 a<p>Surface-capped CdSe and CdTe nano-crystals (NCs) have been synthesized using cadmium acetate, oleic acid and respective tri-octylphosphine chalcogenide (TOPE; E = Se/Te) in diphenyl ether (DPE). Well-dispersed CdSe particles showed two absorption bands at the region of 431-34 and 458-60 nm in optical absorption study. A band-edge emission resulted at 515 nm with an excitation energy of 400 nm, in its photoluminescence (PL) spectrum. Similarly, UV-visible absorption study of CdTe revealed an absorption band at &lt; 700 nm. The broadened X-ray diffraction (XRD) pattern showed that at higher reaction temperature cubic CdSe but hexagonal CdTe can be obtained with crystallite size of &lt; 10 nm. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) revealed that agglomerated particles are of spherical nature. The inter-planar spacing in CdTe was measured to be 0.406 nm, a characteristic of (100) lattice plane in hexagonal CdTe. X-ray photoelectron spectroscopy (XPS) showed that CdSe NCs have better air stability stable than CdTe. Presence of organic moiety around the semiconductor particles was confirmed by infrared (IR) spectroscopy.</p>10aChemical synthesis10aphotoluminescence10aSemiconductors10aSurface capping1 aKhanna, P., K.1 aRao, Srinivasa1 aPatil, K., R.1 aSingh, V., N.1 aMehta, B., R.  uhttps://library.ncl.res.in/content/one-pot-synthesis-oleic-acid-capped-cadmium-chalcogenides-cde-e-se-te-nano-crystals-001689nas a2200241   4500008004100000022001400041245010100055210006900156260009500225300001400320490000700334520080100341653002301142653001901165653001401184653002101198653000801219100001901227700002001246700003001266700001901296856013201315       2011                        eng d  a1533-488000aGlycerol mediated low temperature synthesis of nickel nanoparticles by solution reduction method0 aGlycerol mediated low temperature synthesis of nickel nanopartic  a25650 NORTH LEWIS WAY, STEVENSON RANCH, CA 91381-1439 USAbAMER SCIENTIFIC PUBLISHERScJUN  a5131-51360 v113 a<p>Phase pure Nickel nano-particles were synthesized by in-situ generation of nickel hydrazine hydrate complex (Ni-HH) followed by its decomposition in an alkaline glycerol medium. The synthesis can be performed in an open beaker with or without the use of surface protective reagents. By using the present method, Ni nano-particles can be prepared in large scale. The black nano-powders so-obtained were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), selected area electron diffraction (SAED), Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infra-red (FTIR) spectroscopy and thermal analysis (TGA). XRD and SAED analysis revealed that the synthesized particles were pure crystalline nickel with FCC structure.</p>10aChemical Reduction10aNano-Particles10asynthesis10aTransition Metal10aXRD1 aSingh, Kalpana1 aKate, Kunal, H.1 aChilukuri, V., V. Satayan1 aKhanna, P., K.  uhttps://library.ncl.res.in/content/glycerol-mediated-low-temperature-synthesis-nickel-nanoparticles-solution-reduction-method-001713nas a2200265   4500008004100000022001400041245010500055210006900160260009200229300001400321490000700335520076800342653001601110653001801126653001401144653002301158100001901181700001601200700001901216700002201235700002601257700001901283700001701302856012801319       2012                        eng d  a1533-488000aSono-chemical synthesis of ZnO nano-particles and their application in hydrogen sulphide gas sensing0 aSonochemical synthesis of ZnO nanoparticles and their applicatio  a26650 THE OLD RD, STE 208, VALENCIA, CA 91381-0751 USAbAMER SCIENTIFIC PUBLISHERScMAR  a2791-27960 v123 a<p>Herein we describe synthesis of ZnO nanoparticles by using alkaline solution of ZnX2 (X = NO3, Cl) under ultrasound energy of 20 KHz. The reaction can be completed in about 1-2 hours. As prepared powders were analyzed by XRD measurement to find that the product is hexagonal phase pure ZnO. UV-Visible measurement of aq. solution showed absorption band at similar to 365 nm and photoluminescence (PL) indicated multiple bands in visible region due to deep traps owing to high temperature sintering. The hydrophilicity can be imparted by use of a suitable polyelectrolyte. Freshly prepared samples showed good dispersion in aqueous and alcoholic medium. The thick films derived from the ZnO nano-particles showed excellent sensing for hydrogen sulphide gas.</p>10aGas-Sensing10aSono-Chemical10asynthesis10aZnO Nano-Particles1 aKhanna, P., K.1 aKate, Kunal1 aDhanabalan, K.1 aBanerjee, Shaibal1 aReji, Nedunnkandathil1 aShinde, S., D.1 aJain, G., H.  uhttps://library.ncl.res.in/content/sono-chemical-synthesis-zno-nano-particles-and-their-application-hydrogen-sulphide-gas-0