Preparation and characterization of noble metal nanocolloids by silk fibroin in situ reduction  

作　　者：陈文兴 吴雯 陈海相 沈之荃 

机构地区：[1]College of Materials and Textiles, Zhejiang Institute of Science and Technology, Hangzhou 310033, China [2]Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China

出　　处：《Science China Chemistry》2003年第4期330-338,共9页中国科学（化学英文版）

基　　金：supported by the Natural Science Foundation of Zhejiang Province(Grant No.RC00047).

摘　　要：Noble metal nanocolloids are prepared from their precursors by in situ reduction of a silk fibroin solution at room temperature without any reducing agent. The mechanism, the effects of pH and the molar ratio of the reactants on the reduction reaction are studied by UV-Vis spectros-copy. The structure of the colloids is characterized by FT-IR, TEM and AFM. According to the TEM images, the gold-silk fibroin colloid is a nanostructured bioconjugate with novel core-shell, while the silver-silk fibroin colloid tends to be congregated as clusters having more than ten nanoparti-cles of silver-silk fibroin. The gold colloid is highly dispersed and stable while the silver colloid is less dispersed and stable than the gold colloid.Noble metal nanocolloids are prepared from their precursors by in situ reduction of a silk fibroin solution at room temperature without any reducing agent. The mechanism, the effects of pH and the molar ratio of the reactants on the reduction reaction are studied by UV-Vis spectroscopy. The structure of the colloids is characterized by FT-IR, TEM and AFM. According to the TEM images, the gold-silk fibroin colloid is a nanostructured bioconjugate with novel core-shell, while the silver-silk fibroin colloid tends to be congregated as clusters having more than ten nanoparticles of silver-silk fibroin. The gold colloid is highly dispersed and stable while the silver colloid is less dispersed and stable than the gold colloid.

关 键 词：SILK fibroin   in SITU reduction  GOLD colloid  SILVER colloid. 

分 类 号：O648[理学—物理化学]