探讨了相对分子质量不同的聚乙烯吡咯烷酮对多元醇法制备银纳米结构的影响, 采用扫描电镜和X射线衍射仪对样品进行了表征及分析, 并用紫外可见分光光度计研究了粒子的光学性质。实验结果表明: 在相同的实验条件下, 不同相对分子质量聚乙烯吡咯烷酮将得到不同形貌的银纳米粒子; 相对分子质量为1×104的聚乙烯吡咯烷酮得到的银纳米线产率最大, 随着聚乙烯吡咯烷酮相对分子质量增加, 银纳米线将减少, 相应的银纳米立方体将增多。

This paper researches the influence of different molecular weight polyvinylpyrrolidone on silver nanoconfiguration in polyol process. The silver nanoparticles are characterized by scanning electron microscopy and X-ray diffraction. Their optical properties are studied by UV-Vis spectrophotometer. The results indicate that under of silver nanoparticles different morphology will be made by different molecular weight polyvinylpyrrolidone under the same experimental conditions; the yield of silver nanowires is the largest when the molecular weight of polyvinylpyrrolidone is 1.0×104, and silver nanowires will reduce and silver nanocubes will increase when the molecular weight of polyvinylpyrrolidone increases.