Floating silver film: A flexible surface-enhanced Raman spectroscopy substrate for direct liquid phase detection at gas–liquid interfaces
Floating silver film: A flexible surface-enhanced Raman spectroscopy substrate for direct liquid phase detection at gas–liquid interfaces
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DOI：
10.1007/s12274-016-1009-x
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发表时间：
2016-03
期刊：
影响因子：
9.9
通讯作者：
Zongyuan Wang;Minyue Li;Wen Wang;Min Fang;Qi-di Sun;Chang‐jun Liu
中科院分区：
文献类型：
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作者：
Zongyuan Wang;Minyue Li;Wen Wang;Min Fang;Qi-di Sun;Chang‐jun Liu
近年来，表面增强拉曼光谱（Sers）技术发展迅速，并被用于液体中分子和生物分子的检测。然而，很少有研究关注使用水面作为基底的Sers。浮在水面上的金属膜对于增强的Sers性能是期望的。在这项工作中，银纳米粒子（银纳米粒子）包裹在聚（乙烯吡咯烷酮）膜（银-PVP膜）的水溶液的表面上，通过室温电子还原。首次报道了在水面上形成漂浮的银膜。所合成的Ag-PVP膜是一种优良的柔性Sers基底，并具有其他潜在的应用。使用浮动银膜作为柔性Sers基底，鉴定了10- 11 M的4-氨基苯硫酚、10- 6 M的核黄素、10- 9 M的4-巯基苯甲酸、10- 7 M的4-巯基酚和10- 7 M的4-氨基苯甲酸，证明了浮动基底在分子的液相检测中的潜在用途。
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 nanoparticles (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 applications. Using the floating silver film as a flexible SERS substrate, 10–11M of 4-aminothiophenol, 10–6M of riboflavin, 10–9M of 4-mercaptobenzoic acid, 10–7M of 4-mercaptophenol, and 10–7M of 4-aminobenzoic acid are identified, demonstrating potential use for the floating substrate in the liquid-phase detection of molecules.