中文摘要：

在最近的年里，提高表面的拉曼光谱学(重量的单位) 很快发展了并且在液体被用于分子和 biomolecules 的察觉。然而，很少研究作为底层用水表面集中了于重量的单位。水上的一部漂浮的金属电影为提高的重量的单位表演是合乎需要的。在这个工作，银 nanoparticles (Ag NP ) 装入箱内在(vinylpyrrolidone ) poly，电影(Ag-PVP 电影) 被房间温度在一个水的答案的表面上综合电子减小。水表面上的一部漂浮的银电影从而第一次被完成并且被报导。综合 Ag-PVP 电影是为重量的单位的优秀灵活底层并且有另外的潜在的应用程序。把漂浮的银电影用作灵活重量的单位底层， 4-aminothiophenol 的 10 ^-11 M ，核黄素的 10 ^-6 M ， 4-mercaptobenzoic 酸的 10 ^-9 M ， 4-mercaptophenol 的 10 ^-7 M ，和 4-aminobenzoic 酸的 10 ^-7 M 被识别，为在分子的液体阶段察觉的漂浮的底层的示威潜在的使用。

英文摘要：

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.