Engineering large-scaled electrochromic semiconductor films as reproductive SERS substrates for operando investigation at the solid/liquid interfaces

作     者：Lingling Yang Jiuju Feng Jia-Ning Wang Zhida Gao Jingwen Xu Ye Mei Yan-Yan Song Lingling Yang;Jiuju Feng;Jia-Ning Wang;Zhida Gao;Jingwen Xu;Ye Mei;Yan-Yan Song

作者机构：College of SciencesNortheastern UniversityShenyang 110004China State Key Laboratory of Precision SpectroscopySchool of Physics and Electronic ScienceEast China Normal UniversityShanghai 200062China NYU-ECNU Center for Computational Chemistry at NYU ShanghaiShanghai 200062China Collaborative Innovation Center of Extreme OpticsShanxi UniversityTaiyuan 030006China College of Chemistry and Life SciencesZhejiang Normal UniversityJinhua 321004China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2022年第33卷第12期

页      面：5169-5173页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 070302[理学-分析化学] 0703[理学-化学] 0702[理学-物理学] 

基　　金：supported by National Natural Science Foundation of China(Nos.21874013,22074013 and 22073030) the Fundamental Research Funds for the Central Universities(Nos.N2105018 and N2005027) the China Postdoctoral Science Foundation(No.2019M661109) supported by the Supercomputer Centre of East China Normal University(ECNU Public Platform for Innovation No.001). 

主　　题：Charge transfer Electrochromism Oxygen vacancies SERS substrate Solid liquid interface 

摘      要：Although surface-enhanced Raman spectroscopy(SERS)has been applied for gathering fingerprint information,even in single molecule analysis,the decayed Raman signals in aqueous solutions largely obstruct the on-site insight reaction process.In this study,large-scaled semiconductor films with multi-walled(TiO_(2)/WO_(3)/TiO_(2))nanopore distribution are fabricated by combining electrochemical anodization and sputtering technique,and then employed as the SERS substrates for detection of molecules at the solid/liquid interfaces.Given the remarkably improved electrochromic property of the multi-walled film,such SERS substrates were endowed with tunable oxygen vacancy(VO)density and distribution via simply applying electrochemical bias voltage,which enabled one to achieve an enhanced charge transfer efficiency and thus a remarkably increased Raman signal even in solution.The VO-rich SERS substrate is highly repeatable,thus providing a reliable platform for in-situ monitoring of the target molecules or intermediates at the solid/liquid interfaces.