基于表面等离子体特性的TERS光催化研究

针尖增强拉曼光谱（TERS），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行为，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。本课题拟采用TERS技术，通过研究纳米阵列基底表面探针分子的定点和二维扫描TERS光谱特征，结合基于时域有限差分法（FDTD）的模拟计算结果，分析多种贵金属纳米阵列结构的表面等离子体分布特性。为设计制造纳米阵列结构光学器件、研究纳米结构光波导传输特性等提供设计依据和理论基础。借助TERS具有高空间分辨率的优势，结合纳米阵列结构表面等离子体分布特性，研究光敏探针分子在纳米结构表面的局域光催化过程和机制，以及等离子体对分子光催化反应的决定性影响。进而通过TERS探针控制微纳尺度下局域等离子体诱导分子光催化反应，位于纳米结构表面光敏分子借助TERS技术实现微纳尺度下分子图形的可控绘制，具有重要应用价值和科学意义。

Tip enhanced Raman spectroscopy (TERS), has very high sensitivity and spatial resolution, can be used to study the molecular probe adsorption on surface nano structure, and the interaction between molecules and nano structure, surface plasmon and nanostructures on the distribution characteristics. This paper intends to use TERS technology, through the study of nano array substrate surface probe point and two-dimensional scanning spectrum of TERS, combining based on finite-difference time-domain method (FDTD) simulation results, analysis of surface plasma more noble metal nano array structure distribution. The design basis and theoretical basis for the design and fabrication of nano array optical devices and the transmission characteristics of nano structured optical waveguides are presented. With the help of TERS with high spatial resolution with surface plasmon distribution characteristics of nano array structure, research of photosensitive probe molecules in the local photocatalytic process and mechanism of surface nano structure, and the decisive effect of plasma on molecular photocatalytic reaction. Then the micro nano scale localized plasma induced photocatalytic reaction by TERS molecular probe control, is located in the nano structure surface of the photosensitive molecules achieve micro nano scale controlled molecular graphics rendering using TERS technology, which has important application value and scientific significance.