Enhanced antimicrobial activity of silver nanoparticles with controlled particle size by pH variation

被引：117

作者：

Ajitha, B. ^{[1
]}

Reddy, Y. Ashok Kumar ^{[2
]}

Reddy, P. Sreedhara ^{[1
]}

机构：

[1] Sri Venkateswara Univ, Dept Phys, Tirupati 517502, Andhra Pradesh, India

[2] Korea Adv Inst Sci & Technol, Dept Elect Engn, Taejon 305701, South Korea

来源：

POWDER TECHNOLOGY | 2015年 / 269卷

关键词：

Silver nanoparticles; Surface plasmon resonance; Photoluminescence; Antimicrobial activity; METAL NANOPARTICLES; ANTIBACTERIAL ACTIVITY; PHOTOLUMINESCENCE; SPECTROSCOPY; REDUCTION; CATALYSTS; COLLOIDS; SHAPE;

D O I：

10.1016/j.powtec.2014.08.049

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

PVA capped spherical silver nanoparticles (AgNPs) were synthesized at various pH conditions of reaction solution by chemical reduction method. Tuning of reaction solution pH in a narrow range could have a profound effect on particle size. The synthesized AgNPs have been characterized by studying their structural, morphological, optical and antimicrobial properties. Crystallite size decrement with the increase of pH was confirmed by X-ray diffraction analysis. UV-vis spectra showed single surface plasmon resonance (SPR) peak at similar to 420 nm and a blue shift in SPR was elicited with increment of pH. AgNPs were found to be photoluminescent and enhancement in photoluminescence intensity was observed with the increase in the reaction solution of pH. Fourier transform infrared spectroscopy (FTIR) measurements indicated that the nanoparticles were capped by PVA. The synthesized AgNPs displayed potent antimicrobial activity against Escherichia coli, Pseudomonas sp., Aspergillus niger and Penicillium sp. with particle size decrement. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：110 / 117

页数：8

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