A Combined System of Raman-STM and Preliminary Tests

A combined system of Raman spectroscopy and STM has been set up, which enables the two techniques to in-situ study electrochemical interFaces simultaneously, An optical Fiber head carrying one excitation Fiber and Five collection Fibers can be adjusted to approach to an advanced originally designed STM unit so that the STM tip above the sample electrode are surrounded by the sir Fibers.The strong thermal interFace by the laser illumination was avoided with the short acquisition time For SERS measurements by using optical multichannel analyzer.In-situ SERS spectrum of SCN- adsorbed on Ag electrode surFace has been simultaneously recorded during STM imaging.The STM imaging taken beFore, during and aFter the SERS measurements have driFted From each other within 5%, which shows that the combined system is of satisFied over all stability.国家教委优秀年轻教师基

采用光纤技术实现拉曼光谱和扫描隧道显微镜实时联用测试

设计并制作了与扫描隧道显微镜（STM）探头和拉曼光谱仪相适配的光纤探测装置，该装置采用配有很短焦距的自聚焦透镜以获得较大的相对孔径，并使用多束光纤以充分利用扫描隧道显微镜探针周围有限空间，提高了拉曼散射光的收集效率，获得具有较高信噪比的拉曼谱图。在该装置基础上进一步建立了拉曼-扫描隧道显微镜联用系统．初步实验表明该联用系统用于实时研究固／气和固／液界面体系是可行的，即利用扫描隧道显微镜可获得固体表面的微观形貌，同时利用拉曼光谱可获得表面吸附（反应）物种的分子结构信息，它为表面科学研究提供一种新方法