球形银纳米粒子的微波法制备和表征及其光谱特性研究

摘要

Yellow and sperical silver nanoparticles were prepared by microwave synthesis using polyvinyl alcohol (PVA) as reducing agent and poly(-ethylene glycol-) (PEG) as stabilizing reagent. The optimal synthesis conditions were studied by UV-Vis absorption spectrometry and synchronous light-scattering spectroscopy. The silver nanoparticles prepared were characterized by transmission electron microscope, atomic force microscope, and photon cross-corre lation spetroscopy. It was shown that the maxmum absorption peak of silver nanoparticles was at 415nm, and the strongest peak of sychronous light-scattering was at 470nm.The mean diameter was 14±5nm. The particles have good dispersibility and stability. The microwave synthesis is a fast and convenient method for the preparation of silve nanoparticles.%以聚乙烯醇为还原剂(PVA),聚乙二醇(PEG)为稳定剂,采用微波法制备了黄色、球形的银纳米粒子,用紫外-可见吸收光谱和同步光散射光谱研究了其最佳制备条件.同时采用透射电子显微镜、原子力显微镜、光子相关纳米激光粒度分析,对制备的银纳米进行了表征.实验结果表明,该法制备的银纳米粒子在415nm处存在最大吸收峰,在470nm处存在最强的共振散射峰;其平均粒径为14±5nm,分散性和稳定性较好.该法简单、快捷,为银纳米的应用提供了很好的制备方法.