以聚乙烯毗咯烷酮(PVP)为稳定剂,AgN03为前驱物,乙醉为还原剂及溶剂,制备得到了银纳米粒子.采用紫外-可见吸收光谱及透射电子显微镜等方法对银纳米粒子的光学性质及形貌进行了表征.结果表明,以乙醇为溶剂,PVP可以对银纳米粒子的生长起到很好的表面修饰作用,银纳米粒子在400 nm～410 rim处产生明显的纳米银所具有的表面等离子态特征吸收峰,银纳米粒子的吸收强度随反应时间延长及前驱物浓度增加而提高.透射电子显微镜结果表明银纳米粒子具有球状形貌特征,尺寸分布窄.改变PVP与AgNO_3的投料比,可以得到不同尺寸的银纳米粒子.
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