Controllable Biosynthesis and Properties of Gold Nanoplates Using Yeast Extract

作者：Zhi Yang, Zhaohui Li, Xuxing Lu, Fengjiao He, Xingzhong Zhu, Yujie Ma, Rong He, Feng Gao, Weihai Ni, Yasha Yi · 发表于：Nano-Micro Letters · 年份：2016 · DOI：10.1007/s40820-016-0102-8 · 被引用次数：53 · 研究领域：Nanoparticles: synthesis and applications、Gold and Silver Nanoparticles Synthesis and Applications、Diatoms and Algae Research

In past decades, gold nanostructures have attracted significant interest due to their potential applications in diverse fields, such as surface-enhanced Raman scattering, photothermal therapy, catalysis, electronics, sensing, and imaging, etc. [ 1 – 9 ]. Since the properties of gold nanostructures can be well controlled by sizes, shapes, and crystal orientations, numerous efforts have been made to fabricate gold nanostructures with various morphologies, including nanoplates, nanowires, nanorods, nanocubes, nanoclusters, etc. [ 6 , 10 – 13 ]. Among them, gold nanoplates have attracted increased attention due to their excellent localized surface plasmon resonance properties assigned from their sharp corners and edges. So far, many synthetic strategies were developed to synthesize gold nanoplates, such as seeded-growth method [ 11 , 14 , 15 ], thermal reduction approach [ 16 ], electrochemical approach [ 17 ], and photocatalytic approach [ 18 ]. Notably, Zhang et al. have reported monodispersed triangular gold nanoplates with very high morphological yield (>90 %) using a rapid one-pot seedless growth progress, in which iodide ions not only selectively bind to the Au {111} facets but also selectively remove other less stable shape impurities through oxidative etching by forming triiodide ions, thus facilitating the formation of nuclei with dominant planar structure [ 19 ]. However, gold nanoplates synthesized by chemical approaches have serious limitations in biomedical applicati...