Electrochromic semiconductors as colorimetric SERS substrates with high reproducibility and renewability

Shan Cong, Zhen Wang, Wenbin Gong, Zhigang Chen, Weibang Lu, John R. Lombardi and Zhigang Zhao ()
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Shan Cong: Chinese Academy of Sciences (CAS)
Zhen Wang: Chinese Academy of Sciences (CAS)
Wenbin Gong: Chinese Academy of Sciences (CAS)
Zhigang Chen: Chinese Academy of Sciences (CAS)
Weibang Lu: Chinese Academy of Sciences (CAS)
John R. Lombardi: The City College of New York
Zhigang Zhao: Chinese Academy of Sciences (CAS)

Nature Communications, 2019, vol. 10, issue 1, 1-10

Abstract: Abstract Electrochromic technology has been actively researched for displays, adjustable mirrors, smart windows, and other cutting-edge applications. However, it has never been proposed to overcome the critical problems in the field of surface-enhanced Raman scattering (SERS). Herein, we demonstrate a generic electrochromic strategy for ensuring the reproducibility and renewability of SERS substrates, which are both scientifically and technically important due to the great need for quantitative analysis, standardized production and low cost in SERS. This color-changing strategy is based on a unique quantitative relationship between the SERS signal amplification and the coloration degree within a certain range, in which the SERS activity of the substrate can be effectively inferred by judging the degree of color change. Our results may provide a first step toward the rational design of electrochromic SERS substrates with a high sensitivity, reproducibility, and renewability.

Date: 2019
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DOI: 10.1038/s41467-019-08656-6

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