Preparation and characterization of noble metal nanocolloids by silk fibroin <Emphasis Type="Italic">in situ</Emphasis> reduction |
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| Authors: | Chen?Wenxing Wen?Wu Haixiang?Chen Email author" target="_blank">Zhiquan?ShenEmail author |
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| Institution: | (1) College of Materials and Textiles, Zhejiang Institute of Science and Technology, 310033 Hangzhou, China;(2) Department of Polymer Science and Engineering, Zhejiang University, 310027 Hangzhou, China |
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| Abstract: | 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. |
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| Keywords: | silk fibroin in situ reduction gold colloid silver colloid |
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