Solid-State Synthesis of Silver Nanoparticles at Room Temperature: Poly(vinylpyrrolidone) as a Tool
Solid-State Synthesis of Silver Nanoparticles at Room Temperature: Poly(vinylpyrrolidone) as a Tool
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DOI：
10.1002/marc.200900656
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发表时间：
2010-03-16
影响因子：
4.6
通讯作者：
Geckeler, Kurt E.
中科院分区：
文献类型：
--
作者：
Debnath, Dipen;Kim, Chorong;Geckeler, Kurt E.
银纳米颗粒的使用由来已久，最近又开发了各种方法来生产银纳米颗粒。本文首次报道了用聚乙烯吡咯烷酮还原银盐的固相高速振动球磨法制备纳米银的方法。该合成是在室温下进行的，不需要表面活性剂来指导纳米颗粒的各向异性生长。用紫外可见光谱、透射电子显微镜和粉末X射线衍射技术研究了纳米粒子的形成过程。结果表明，所合成的纳米粒子尺寸和形状均一，平均直径小于5 nm。此外，还研究了这些银纳米粒子对大肠杆菌的抑菌活性，发现它们的抗菌活性都是阳性的。
Silver nanoparticles have been used for a long time and recently various methods have been additionally developed for their production. Here we report for the first time a solid-state highspeed vibration milling method for the synthesis of silver nanoparticles, in which poly(vinylpyrrolidone) is used for the reduction of the silver salt. The synthesis is performed at room temperature and no surfactant to direct the anisotropic growth of the nanoparticles is required. The formation of the nanoparticles was studied by UV Visible spectroscopy, transmission electron microscopy, and powder X-ray diffraction techniques. The nanoparticles synthesized were found to be uniform in size and shape with an average diameter of less than 5 nm. In addition, the antimicrobial activity of these silver nanoparticles was investigated against Escherichia coli and found to be positive.