01952nas 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-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-0