Floating silver film： A flexible surface-enhanced Raman spectroscopy substrate for direct liquid phase detection at gas-liquid interfaces

作     者：Zongyuan Wang Minyue Li Wei Wang Min Fang Qidi Sun Changjun Liu 

作者机构：Collaborative Innovation Center of Chemical Science and Engineering School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2016年第9卷第4期

页      面：1148-1158页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 080202[工学-机械电子工程] 08[工学] 0817[工学-化学工程与技术] 070302[理学-分析化学] 0703[理学-化学] 0802[工学-机械工程] 

基　　金：This work was supported by the National Natural Science Foundation of China (No. 91334206). The authors thank Dr. Jeanne Wynn for her help in the use of English and Dr. Tao Xue for Raman measurement. The authors declare no competing financial interests 

主　　题：liquid phase detection surface-enhanced Raman gas/liquid silver film poly(vinylpyrrolidone) electron reduction 

摘      要：In recent years, surface-enhanced Raman spectroscopy （SERS） has developed rapidly and is used for the detection of molecules and biomolecules in liquids. However, few studies have focused on SERS using a water surface as the substrate. A floating metal film on water is desirable for an enhanced SERS performance. In this work, silver nanopartides （Ag NPs） encased in poly（vinylpyrrolidone） films （Ag-PVP films） were synthesized on the surface of an aqueous solution by room temperature electron reduction. A floating silver film on a water surface was thereby achieved and is reported for the first time. The synthesized Ag-PVP film is an excellent flexible substrate for SERS and has other potential appli- cations. Using the floating silver film as a flexible SERS substrate, 10-11 M of 4-aminothiophenol, 10^-6 M of riboflavin, 10^-9 M of 4-mercaptobenzoic acid, 10^-7 M of 4-mercaptophenol, and 10^-7 M of 4-aminobenzoic acid are identified, demonstrating potential use for the floating substrate in the liquid-phase detection of molecules.