针尖增强拉曼光谱纳米探针的研制及应用

针尖增强拉曼光谱（TERS）系统，具有很高的灵敏度和空间分辨特性，可以用于研究探针分子在纳米结构表面的吸附模式和分布，以及分子与纳米结构之间的相互作用，进而研究纳米结构的表面等离子体分布特性。这正是现在表面科学，分析科学和纳米材料科学研究所急需的技术手段。TERS体系核心技术之一是TERS增强纳米探针的研制及其增强效果。国内目前使用的TERS探针全部依赖进口，价格昂贵，并且纳米探针增强效果不理想。本课题拟采用磁控溅射、真空热蒸发镀膜和电化学腐蚀等技术，研制一系列TERS专用纳米探针，包括用于微区定点增强的贵金属TERS纳米探针和用于微区扫描的贵金属包覆硅基TERS纳米探针。TERS纳米探针的研发将带来国内在TERS技术方面的突破，将推动在微区拉曼检测、微纳结构近场测量和表面等离子体等研究领域的发展。

Tip enhanced Raman spectroscopy(TERS) system which has excellent capability of high sensitivity and spatial resolution play an important role in the study of adsorption mode and distribution of probing molecules on the surface of nanostructure, the interaction between the molecules and nanostructure, distribution character of surface plasmon resonance of nano-scale metal materials. So, TERS method is becoming more important in the area of surface science, analytical science and nano material science, etc. One of the key technologies in TERS system is preparation of TERS tips with high enhancement effect. Most of the TERS tips are imported from abroad.Not only the price of the TERS tips are very expensive, but also the enhancement effect of nano tips are not very high. Our project is mainly focused on preparing the nano tips used in TERS system which include using in fixed point TERS detection and micro-scanning TERS measurement analysis. In the topics, two kinds of nano tips used in TERS sysytem will be prepared by magnetic sputtering, vacuum evaporation coating machine and electrochemical corrosion methods, including On the one hand, the nano tips used in fixed point detection will be prepared by coating noble metal thin films, such as silver, gold ,gold-silver alloy or silver/gold/silver sandwich layers using magnetic sputtering or vacuum evaportaion. On the other hand, the nano tips used in micro-scanning analysis will be fabricated by electrochemical corrsioning noble metal silks. In this item, preparation of TERS using nano tips will promote the development of TERS technology and improve competitiveness and even to reach and surpass the overseas existing product's enhancement effect properties.