Surface-Enhanced Raman Scattering of Benzenethiol Adsorbed on Silver-Exchanged Copper Powders

Bulletin of the Korean chemical society

Hyunwoo Ryoo¹  Kuan Soo Shin¹  Yoon Mi Lee¹  Kwan Kim¹ 

关键词: Surface-enhanced Raman scattering;    Copper powder;    Silver dendrite;    Galvanic exchange;    Benzenethiol;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

Micrometer-sized copper (レCu) powders are weakly surface-enhanced Raman scattering (SERS) active by the excitation at 632.8 nm, but nearly ineffective as a SERS substrate at 514.5 nm excitation. The SERS activity of レCu powders at both excitation wavelengths can be increased dramatically by a simple method of the galvanic exchange reaction with AgNO3 in aqueous medium. In this work, the SERS activity of the Ag-exchanged Cu powders (レCu@Ag) has been evaluated by taking a series of Raman spectra using benzenethiol (BT) as the probe molecule. It is clearly confirmed by field emission scanning electron microscopy and X-ray diffractometry that the SERS activity of レCu@Ag powders is, in fact, highly dependent on the extent of galvanic reaction.

【 授权许可】

Unknown