球形银纳米粒子的微波法制备和表征及其光谱特性研究

Preparation of spherical silver nanoparticles by microwave method and their characterization

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。

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.