Comparative study of the Ag/PVP nanocomposites synthesized in water and in ethylene glycol

被引：16

作者：

Arshi, Nishat ^{[1
]}

Ahmed, Faheem ^{[1
]}

Kumar, Shalendra ^{[1
]}

Anwar, M. S. ^{[1
]}

Koo, Bon Heun ^{[1
]}

Lee, Chan Gyu ^{[1
]}

机构：

[1] Changwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, Gyeongnam, South Korea

来源：

CURRENT APPLIED PHYSICS | 2011年 / 11卷 / 01期

关键词：

Nanocomposites; Antibacterial activity; Escherichia coli; Silver nanoparticles; NANOPARTICLES; ANTIBACTERIAL;

D O I：

10.1016/j.cap.2010.11.045

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report direct synthesis of Ag/PVP nanocomposites using PVP (polyvinylpyrrolidone) as a reducing agent. Ag/PVP nanocomposites were synthesized after mixing PVP with acetone and a small amount of aqueous silver nitrate (AgNO3) under magnetic stirring. The Ag/PVP colloids were then dissolved in water (sample 1) and in ethylene glycol (sample 2) and stirred for 10 days. UV/vis spectra show surface plasmon band in the visible region, centered at wavelengths between 435 and 445 nm, a clear consequence of the nano size of dilute Ag particles. TEM results showed that the Ag/PVP nanocomposites have particle sizes ranging from 1 to 6 nm and 1 to 12 nm for colloids in water and ethylene glycol respectively. Antibacterial activity of these silver nanocomposites as a function of particles concentration against gram-negative bacterium Escherichia coli (E. coli) was carried out in solid growth media. Both the nanocomposites showed good antibacterial activity and caused a growth delay of E. coli with zone of inhibition similar to 16 mm. There was very little difference between antibacterial activities of two types of silver nanocomposites, though sample 1 with smaller size showed a slightly better antibacterial action. (C) 2010 Elsevier B. V. All rights reserved.

引用

页码：S346 / S349

页数：4

共 15 条

[1] Chemistry and properties of nanocrystals of different shapes [J].