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-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-0