Electro co-deposition of copper-silver nanocrystallite alloy cluster: A way for tunable SERS substrate development

IF 2.2 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters: X Pub Date : 2022-09-01 DOI:10.1016/j.mlblux.2022.100157

Balakrishnan Rajashekhar , Gaurav Pandey , Ramachandran Sekar , Murugan Veerapandian

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引用次数: 1

Abstract

Surface-enhanced Raman spectroscopy (SERS) exhibits intriguing analytical application owing to their non-invasive method, specificity, and sensitivity. However, development of tunable SERS active substrate remains a challenge. Herein, we report a straightforward chronoamperometric co-deposition strategy, utilizing a reducing agent, to form bimetallic coating comprised of Cu/Ag on silica substrate, where alteration of deposition current endows fractional variations in the nucleation/growth of Cu²⁺ → Cu⁺/Cu⁰ and Ag²⁺ → Ag⁺/Ag⁰. Properties of optical reflectance, surface chemistry, topography, and nanocrystallite cluster orientation were characterized. Experimental results confirm bimetallic coating with large proportion of Ag on Cu matrix could enable better SERS behavior with studied model, Rhodamine 6G.

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电共沉积铜-银纳米晶合金簇：一种可调谐SERS衬底的开发方法

表面增强拉曼光谱(SERS)由于其非侵入性方法，特异性和敏感性而具有有趣的分析应用。然而，可调谐SERS有源衬底的开发仍然是一个挑战。在此，我们报告了一种简单的时间电流共沉积策略，利用还原剂在二氧化硅衬底上形成由Cu/Ag组成的双金属涂层，其中沉积电流的改变使Cu2+→Cu+/Cu0和Ag2+→Ag+/Ag0的成核/生长发生了微小的变化。表征了其光学反射率、表面化学、形貌和纳米晶簇取向的性质。实验结果证实，在铜基体上添加较大比例Ag的双金属涂层可以使所研究的模型Rhodamine 6G具有更好的SERS行为。

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来源期刊

Materials Letters: X Multiple-

CiteScore

3.10

自引率

0.00%

发文量

审稿时长

114 days