Synthesis and anti-bacterial activity of Cu, Ag and Cu-Ag alloy nanoparticles: A green approach

被引：291
|
作者：
Valodkar, Mayur [1 ]
Modi, Shefaly [1 ]
Pal, Angshuman [1 ]
Thakore, Sonal [1 ]
机构：
[1] Maharaja Sayajirao Univ Baroda, Fac Sci, Dept Chem, Vadodara 390002, Gujarat, India
来源：
MATERIALS RESEARCH BULLETIN | 2011年 / 46卷 / 03期
关键词：
Nanostructures; Alloys; Electron microscopy; Optical properties; MICROWAVE-ASSISTED SYNTHESIS; SILVER NANOPARTICLES; AU-AG; ANTIMICROBIAL ACTIVITY; SHELL NANOPARTICLES; GOLD; COPPER; POLYMER; AGENT;
D O I：
10.1016/j.materresbull.2010.12.001
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Metallic and bimetallic nanoparticles of copper and silver in various proportions were prepared by microwave assisted chemical reduction in aqueous medium using the biopolymer, starch as a stabilizing agent. Ascorbic acid was used as the reducing agent. The silver and copper nanoparticles exhibited surface plasmon absorption resonance maxima (SPR) at 416 and 584 nm, respectively; while SPR for the Cu-Ag alloys appeared in between depending on the alloy composition. The SPR maxima for bimetallic nanoparticles changes linearly with increasing copper content in the alloy. Transmission electron micrograph (TEM) showed monodispersed particles in the range of 20 +/- 5 nm size. Both silver and copper nanoparticles exhibited emission band at 485 and 645 nm, respectively. The starch-stabilized nanoparticles exhibited interesting antibacterial activity with both gram positive and gram negative bacteria at micromolar concentrations. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：384 / 389
页数：6
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