银纳米粒子稳定水相分散体的合成与光谱研究。

Synthesis and spectroscopic studies of stable aqueous dispersion of silver nanoparticles.

机构信息

Chemistry Department, Faculty of Science, King Abdul Aziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia.

出版信息

Spectrochim Acta A Mol Biomol Spectrosc. 2011 Sep;79(5):1505-10. doi: 10.1016/j.saa.2011.05.007. Epub 2011 Jun 6.

DOI:10.1016/j.saa.2011.05.007

Abstract

A facile approach for the synthesis of stable aqueous dispersion of silver nanoparticles (AgNPs) using glucose as the reducing agent in water/micelles system, in which cetyltrimethylammonium bromide (CTAB) was used as capping agent (stabilizer) is described. The evolution of plasmon band of AgNPs was monitored under different conditions such as (a) concentration of sodium hydroxide, (b) concentration of glucose, (c) concentration of silver nitrate (d) concentration of CTAB, and (e) reaction time. AgNPs were characterized by UV-visible spectroscopy, transmission electron microscopy (TEM), fluorescence spectroscopy and FT-IR spectroscopy. The results revealed an easy and viable strategy for obtaining stable aqueous dispersion of AgNPs with well controlled shape and size below 30 nm in diameter.

摘要

一种简便的方法，使用葡萄糖作为还原剂，在水/胶束体系中合成稳定的银纳米粒子（AgNPs）的水溶液，其中十六烷基三甲基溴化铵（CTAB）用作包覆剂（稳定剂）。监测了银纳米粒子的等离子体带在不同条件下的演变，如（a）氢氧化钠浓度，（b）葡萄糖浓度，（c）硝酸银浓度，（d）CTAB 浓度和（e）反应时间。通过紫外-可见光谱、透射电子显微镜（TEM）、荧光光谱和傅里叶变换红外光谱对 AgNPs 进行了表征。结果表明，这是一种获得稳定的、尺寸在 30nm 以下的、具有良好控制形状和尺寸的 AgNPs 水溶液的简便可行的策略。