Semiconductor SERS on Colourful Substrates with Fabry‐Pérot Cavities. (14th February 2023)

• Record Type: Journal Article
• Authors: Li, Feifan; Mu, Xinyang; Tang, Xueqing; Song, Ge; Sun, Hongzhao; Zha, Xiuling; Sun, Peiyan; Fang, Jianhui; Hu, Dongmei; Cong, Shan; Zhao, Zhigang
• Is Part Of: Angewandte Chemie. Volume 135:Number 12(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2023-02-14
• Subjects: Fabry-Pérot Cavities -- Semiconductors -- Substrates -- Surface-Enhanced Raman Scattering; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.202218055
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Non‐metallic materials have emerged as a new family of active substrates for surface‐enhanced Raman scattering (SERS), with unique advantages over their metal counterparts. However, owing to their inefficient interaction with the incident wavelength, the Raman enhancement achieved with non‐metallic materials is considerably lower with respect to the metallic ones. Herein, we propose colourful semiconductor‐based SERS substrates for the first time by utilizing a Fabry‐Pérot cavity, which realize a large freedom in manipulating light. Owing to the delicate adjustment of the absorption in terms of both frequency and intensity, resonant absorption can be achieved with a variety of non‐metal SERS substrates, with the sensitivity further enhanced by ≈100 times. As a typical example, by introducing a Fabry‐Pérot‐type substrate fabricated with SiO2 /Si, a rather low detection limit of 10 −16 M for the SARS‐CoV‐2S protein is achieved on SnS2 . This study provides a realistic strategy for increasing SERS sensitivity when semiconductors are employed as SERS substrates. Abstract : Colourful SERS substrates can be achieved by involving Fabry‐Pérot cavities with semiconductor materials. These are capable of enhancing the sensitivity by manipulating light into resonant absorption.