02139nas a2200229   4500008004100000022001400041245015600055210006900211260009200280300001400372490000600386520124100392653001701633653001801650653001901668653002101687100002501708700001401733700001701747700001501764856013001779       2005                        eng d  a1533-488000aBiosynthesis of gold and silver nanoparticles using emblica officinalis fruit extract, their phase transfer and transmetallation in an organic solution0 aBiosynthesis of gold and silver nanoparticles using emblica offi  a26650 THE OLD RD, STE 208, VALENCIA, CA 91381-0751 USAbAMER SCIENTIFIC PUBLISHERScOCT  a1665-16710 v53 a<p>The design, synthesis and characterization of biologically synthesized nanomaterials have become an area of significant interest. In this paper, we report the extracellular synthesis of gold and silver nanoparticles using Emblica Officinalis (amla, Indian Gooseberry) fruit extract as the reducing agent to synthesize Ag and Au nanoparticles, their subsequent phase transfer to an organic solution and the transmetallation reaction of hydrophobized silver nanoparticles with hydrophobized chloroaurate ions. On treating aqueous silver sulfate and chloroauric acid solutions with Emblica Officinalis fruit extract, rapid reduction of the silver and chloroaurate ions is observed leading to the formation of highly stable silver and gold nanoparticles in solution. Transmission Electron Microscopy analysis of the silver and gold nanoparticles indicated that they ranged in size from 10 to 20 nm and 15 to 25 nm respectively. Ag and Au nanoparticles thus synthesized were then phase transferred into an organic solution using a cationic surfactant octadecylamine. Transmetallation reaction between hydrophobized silver nanoparticles and hydrophobized chloroaurate ions in chloroform resulted in the formation of gold nanoparticles.</p>10aBiosynthesis10aNanomaterials10aPhase transfer10aTransmetallation1 aAnkamwar, Balaprasad1 aDamle, C.1 aAhmad, Absar1 aSastry, M.  uhttps://library.ncl.res.in/content/biosynthesis-gold-and-silver-nanoparticles-using-emblica-officinalis-fruit-extract-their-002039nas a2200217   4500008004100000022001400041245011900055210006900174260008600243300001000329490000700339520121600346653001701562653002301579653001801602653001801620100002501638700001701663700001401680856012701694       2005                        eng d  a1553-317400aGold nanotriangles biologically synthesized using tamarind leaf extract and potential application in vapor sensing0 aGold nanotriangles biologically synthesized using tamarind leaf   a325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USAbTAYLOR & FRANCIS INCcFEB  a19-260 v353 a<p>The size and shape dependent electronic and chemical properties of metal nanoparticles has drawn the attention of chemists, physicists, biologists, and engineers who wish to use them for the development of new generation nanodevices. In this article, we report the synthesis of gold nanotriangles using tamarind leaf extract as the reducing agent. On treating aqueous chloroauric acid solution with tamarind leaf extract, rapid reduction of the chloroaurate ions is observed leading to the formation of flat and thin single crystalline gold nanotriangles. Atomic force microscopy analysis of the gold nanotriangles indicated that they ranged in thickness from 20 to 40 nm. These gold nanotriangles with unique and highly anisotropic planer shapes might find application in photonics, optoelectronics, and optical sensing. We investigated the effect of different organic solvent vapors like methanol, benzene and acetone on the conductivity of tamarind leaf extract reduced gold nanotriangles. I-V characteristics measurement of these nanotriangles was done in presence of these organic solvent vapors. The observed characteristics suggest the application of gold nanotriangles to future chemical sensors.</p>10aBiosynthesis10agold nanotriangles10atamarind leaf10avapor sensing1 aAnkamwar, Balaprasad1 aChaudhary, M1 aSastry, M  uhttps://library.ncl.res.in/content/gold-nanotriangles-biologically-synthesized-using-tamarind-leaf-extract-and-potential-0