The application of  Ag+ detection based on porous silicon SERS substrates

Chen Chen; Yushuai Yuan; Xiaorong Ma; Ziwei Zhang; Xiaoyi Lv; Shengya Feng

doi:10.1117/12.2537746

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18 November 2019 The application of Ag+ detection based on porous silicon SERS substrates

Chen Chen, Yushuai Yuan, Xiaorong Ma, Ziwei Zhang, Xiaoyi Lv, Shengya Feng

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Proceedings Volume 11189, Optical Metrology and Inspection for Industrial Applications VI; 111890J (2019) https://doi.org/10.1117/12.2537746
Event: SPIE/COS Photonics Asia, 2019, Hangzhou, China

Abstract

Silver ions cannot exist in excess in the human body. Conventional instrumental analysis methods such as atomic emission and atomic absorption are commonly used to detect Ag ⁺, but the sensitivity is not satisfactory. Therefore, we developed a novel surface-enhanced Raman scattering (SERS) substrate with a single-layer porous silicon structure, and we completed the detection of Ag ⁺ in domestic water and food based on this substrate. The SERS substrate with porous silicon structure has high detection sensitivity. It is found that Ag ⁺ can be oxidized and deposited on porous silicon to change the Raman spectral properties. The results show that the Raman spectral intensity is linearly related to different content of silver ions, and the maximum linear correlation coefficient is 0.95123. The exploratory research results prove that the newly prepared SERS substrate with single-layer porous silicon is has great significance for the detection of water source and food safety.

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Chen Chen, Yushuai Yuan, Xiaorong Ma, Ziwei Zhang, Xiaoyi Lv, and Shengya Feng "The application of Ag+ detection based on porous silicon SERS substrates", Proc. SPIE 11189, Optical Metrology and Inspection for Industrial Applications VI, 111890J (18 November 2019); https://doi.org/10.1117/12.2537746

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