Direct synthesis of Au-Ag nanoframes by galvanic replacement via a continuous concaving process

doi:10.1039/d2nr01600a

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	Direct synthesis of Au-Ag nanoframes by galvanic replacement via a continuous concaving process
	F. Cheng; W. J. Gu; H. Zhang; C. Y. Song; Y. F. Zhu; F. Y. Ge; K. M. Qu; H. Xu; X. J. Wu and L. H. Wang
	2022
发表期刊	Nanoscale
ISSN	2040-3364
卷号	14 期号:24 页码:8825-8832
摘要	Controlled synthesis of noble-metal nanoframes is of great interest due to their promising applications in plasmonics and catalysis. However, the synthesis is largely limited to a multiple-step approach involving selective deposition followed by selective etching. Here we report a facile and general strategy to synthesize Au-Ag nanoframes based on a direct galvanic replacement reaction between Ag nanoparticles and a gold(i) complex, sodium aurothiosulfate, without an extra etching process. The formation of Au-Ag nanoframes in our approach undergoes a continuous concaving and hollowing-out process from Ag templates, which is related to selective Au deposition and the Kirkendall effect. As a proof-of-concept, it was shown that Au-Ag nanoframes with different dimensions can be prepared from the corresponding Ag nanocolloids using our strategy. The prepared wire-like Au-Ag nanoframes show superior single-particle surface-enhanced Raman scattering due to the linear narrow nanogaps within the nanoframes. We believe this study signifies a new approach by mediating galvanic replacement to prepare noble-metal nanoframes with precise controllability, which may enable a variety of applications in plasmonics and catalysis.
DOI	10.1039/d2nr01600a
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收录类别	sci ; ei
语种	英语
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文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/66566
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	F. Cheng,W. J. Gu,H. Zhang,et al. Direct synthesis of Au-Ag nanoframes by galvanic replacement via a continuous concaving process[J]. Nanoscale,2022,14(24):8825-8832.
APA	F. Cheng.,W. J. Gu.,H. Zhang.,C. Y. Song.,Y. F. Zhu.,...&X. J. Wu and L. H. Wang.(2022).Direct synthesis of Au-Ag nanoframes by galvanic replacement via a continuous concaving process.Nanoscale,14(24),8825-8832.
MLA	F. Cheng,et al."Direct synthesis of Au-Ag nanoframes by galvanic replacement via a continuous concaving process".Nanoscale 14.24(2022):8825-8832.

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