Antimicrobial dependence of silver nanoparticles on surface plasmon resonance bands against Escherichia coli

IF 4.9 Q2 NANOSCIENCE & NANOTECHNOLOGY

Nanotechnology, Science and Applications Pub Date : 2016-12-20 DOI:10.2147/NSA.S123681

Nichrous Mlalila, H. Swai, A. Hilonga, D. Kadam

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引用次数: 55

Abstract

This study presents a simple and trouble-free method for determining the antimicrobial properties of silver nanoparticles (AgNPs) based on the surface plasmon resonance (SPR) bands. AgNPs were prepared by chemical reduction method using silver nitrates as a metallic precursor and formaldehyde (HCHO) as a reducing agent and capped by polyethylene glycol. Effects of several processing variables on the size and shape of AgNPs were monitored using an ultraviolet–visible spectrophotometer based on their SPR bands. The formed particles showing various particle shapes and full width at half maximum (FWHM) were tested against Escherichia coli by surface spreading using agar plates containing equal amounts of selected AgNPs samples. The NPs exhibited higher antimicrobial properties; however, monodispersed spherical NPs with narrow FWHM were more effective against E. coli growth. The NPs prepared are promising candidates in diverse applications such as antimicrobial agents in the food and biomedical industries.

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银纳米粒子对大肠杆菌表面等离子体共振谱带的抗菌依赖性

本研究提出了一种基于表面等离子体共振（SPR）谱带测定银纳米颗粒（AgNPs）抗菌性能的简单无故障方法。以硝酸银为金属前驱体，甲醛（HCHO）为还原剂，聚乙二醇封端，采用化学还原法制备了AgNPs。使用基于SPR带的紫外-可见分光光度计监测了几个加工变量对AgNPs尺寸和形状的影响。通过使用含有等量选定AgNPs样品的琼脂平板进行表面铺展，对显示出各种颗粒形状和半峰全宽（FWHM）的形成颗粒进行对抗大肠杆菌的测试。纳米颗粒具有较高的抗菌性能；然而，具有窄FWHM的单分散球形NP对大肠杆菌生长更有效。所制备的纳米粒子在食品和生物医学行业的抗菌剂等各种应用中都是有前景的候选者。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nanotechnology, Science and Applications NANOSCIENCE & NANOTECHNOLOGY-

CiteScore

11.70

自引率

0.00%

发文量

审稿时长

16 weeks

期刊介绍： Nanotechnology, Science and Applications is an international, peer-reviewed, Open Access journal that focuses on the science of nanotechnology in a wide range of industrial and academic applications. The journal is characterized by the rapid reporting of reviews, original research, and application studies across all sectors, including engineering, optics, bio-medicine, cosmetics, textiles, resource sustainability and science. Applied research into nano-materials, particles, nano-structures and fabrication, diagnostics and analytics, drug delivery and toxicology constitute the primary direction of the journal.