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      Green synthesis, antibacterial, antioxidant and cytotoxic effect of gold nanoparticles using Pistacia Atlantica extract

      , , ,
      Journal of the Taiwan Institute of Chemical Engineers
      Elsevier BV

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          Green synthesis of metal nanoparticles using plants

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            Biosynthesis of silver and gold nanoparticles by novel sundried Cinnamomum camphora leaf

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              Rapid synthesis of Au, Ag, and bimetallic Au core-Ag shell nanoparticles using Neem (Azadirachta indica) leaf broth.

              We report on the use of Neem (Azadirachta indica) leaf broth in the extracellular synthesis of pure metallic silver and gold nanoparticles and bimetallic Au/Ag nanoparticles. On treatment of aqueous solutions of silver nitrate and chloroauric acid with Neem leaf extract, the rapid formation of stable silver and gold nanoparticles at high concentrations is observed to occur. The silver and gold nanoparticles are polydisperse, with a large percentage of gold particles exhibiting an interesting flat, platelike morphology. Competitive reduction of Au3+ and Ag+ ions present simultaneously in solution during exposure to Neem leaf extract leads to the synthesis of bimetallic Au core-Ag shell nanoparticles in solution. Transmission electron microscopy revealed that the silver nanoparticles are adsorbed onto the gold nanoparticles, forming a core-shell structure. The rates of reduction of the metal ions by Neem leaf extract are much faster than those observed by us in our earlier studies using microorganisms such as fungi, highlighting the possibility that nanoparticle biological synthesis methodologies will achieve rates of synthesis comparable to those of chemical methods. Copyright 2004 Elsevier Inc.
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                Author and article information

                Journal
                Journal of the Taiwan Institute of Chemical Engineers
                Journal of the Taiwan Institute of Chemical Engineers
                Elsevier BV
                18761070
                December 2018
                December 2018
                : 93
                : 21-30
                Article
                10.1016/j.jtice.2018.07.018
                951013cf-f652-4dfc-a319-eb7511684b63
                © 2018

                https://www.elsevier.com/tdm/userlicense/1.0/

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