Type I Collagen-Mediated Synthesis and Assembly of UV-Photoreduced Gold Nanoparticles and Their Application in Surface-Enhanced Raman Scattering

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• 作者：Gang Wei ; Li Wang ; Lanlan Sun ; Yonghai Song ; Yujing Sun ; Cunlan Guo ; Tao Yang ; Zhuang Li
• 刊名：Journal of Physical Chemistry C
• 出版年：2007
• 出版时间：February 8, 2007
• 年：2007
• 卷：111
• 期：5
• 页码：1976 - 1982
• 全文大小：557K
• 年卷期：v.111,no.5(February 8, 2007)
• ISSN：1932-7455

文摘

We reported a simple method to synthesize gold nanoparticles (NPs) by photoreducing HAuCl₄ in acetic acidsolution in the presence of type I collagen. It was found that the collagen takes an important role in theformation of gold NPs. The introduction of collagen made the shape of the synthesized gold nanocrystalschange from triangular and hexangular gold nanoplates to size-uniform NPs. On the other hand, thanks to thespecial characters of collagen molecules, such as its linear nanostructure, are positively charged when the pH< 7, and the excellent self-assembly ability, photoreduced gold NPs were assembled onto the collagen chainsand formed gold NPs films and networks. A typical probe molecule, 4-aminothiophenol, was used to test thesurface-enhanced Raman scattering activity of these gold NPs films and networks and the results indicatedgood Raman activity on these substrates.