贵金属超结构图形阵列的制备及其SERS性能研究

项目名称： 贵金属超结构图形阵列的制备及其SERS性能研究

项目编号： No.11304188

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 田翠锋

作者单位： 山西大同大学

项目金额： 30万元

中文摘要： 表面增强拉曼光谱作为一种高效的分子谱学技术，在生物、化学、医学和环境等领域有着广泛的应用。其中最关键的问题是难以获得同时具有高灵敏度和高重复性的SERS基底。目前，主要采用电子束微影法、模板法和化学法相结合等方法提高SERS基底的重复性和灵敏性。但是基底颗粒之间的间隙密度不高或者是分布不均匀。因此，本项目拟采用二维受限电化学方法生长Cu、Au和Ag纳米图形阵列，在此基础上使用置换反应以及二次生长方法构筑具有丰富超小间隙的超结构，从而获得分布均匀且密度较高的间隙，并揭示超结构图形阵列的生长规律。通过对贵金属超结构图形阵列的SERS性能和电磁场分布的深入研究，深入理解光与分子和纳米结构的相互作用机制，具有重要的学术价值。同时，贵金属超结构图形阵列用作SERS基底，检测信号具有高灵敏性、高重复性和稳定性，具有重要的应用前景。

中文关键词： 贵金属；超结构；微观图形；阵列；表面增强拉曼散射

英文摘要： Surface enhanced Raman spectroscopy as a powerful molecular spectroscopy technique, has been widely used in diverse fields which included chemistry, biology, medicine and environment. While it is difficult to obtain the surface enhanced Raman scattering (SERS) substrate with high sensitivity and high reproducibility simultaneously. Now, electron beam lithography method, combining template and chemical method etc. were used to improve the two aspects of SERS substrate. But on the substrate, the nanogaps between nanoparticles have not high density or non-uniform distributions. Therefore, in this subject, nano-pattern array of copper, gold and silver will be prepared by two-dimensional limited electrochenmistry growth. Then the superstructure with abundant and small nanogaps will be prepared on the above sample by metal ion replacement or secondary growth method. The uniform nanogaps with a higher density and the growth mechanism of hirarchical noble metal pattern array will be obtained. To understand the interaction mechanism between light, the probe molecule and nano structure, we will research the SERS performance and the electromagnetic field distribution of hirarchical noble metal pattern array. It has important academic value. Raman signal is high sensitivity, high reproductively and stability on such SERS s

英文关键词： noble metal；superstructure；micro-pattern；array；SERS