基于纳米棒超结构的等离激元效应下的催化与传感应用研究

发布时间：2018-06-03 01:04

本文选题：等离激元超结构 + SERS监控催化　；参考：《中国科学技术大学》2015年硕士论文

【摘要】：本论文主要是基于金纳米棒构筑的等离激元超结构在SERS催化和SERS传感的应用研究。最近,构筑等离激元超结构引起了人们的广泛兴趣,在于超结构内部的光学热点,造成了等离激元场的近场耦合,从而能很大程度地激发拉曼探针的信号,在基于SERS传感检测领域有广泛的应用前景。我们在高产率合成高纯度的金纳米棒基础上,借助选择性原位沉积与刻蚀机制,构筑了Au@SiO2@AgPt三元金属纳米超结构,发展了几种新颖的具有不同SERS增强能力和催化能力的超结钩,并给予了评价。最终我们选择了集成了SERS检测与纳米催化的优势的等离激元超结构的三元金属组装体,实现了对催化反应的SERS实时监控,为了解催化反应机理,提供了新策略。另一方面,我们构筑了基于金银核壳式纳米棒的大尺度的高度有序三维超晶体,并将其运用在病原性微生物大肠杆菌的光学识别上。相比于传统的细菌识别技术,目前的SERS光谱技术能提高识别的敏感性和准确性。
[Abstract]:This thesis is mainly about the application of isobaric superstructure based on gold nanorods in SERS catalysis and SERS sensing. Recently, the construction of isobaric superstructures has aroused widespread interest in the optical hot spots within the superstructures, resulting in the near-field coupling of the isoexcitator fields, which can excite the signal of the Raman probe to a large extent. It has a wide application prospect in the field of sensing detection based on SERS. On the basis of high yield synthesis of high purity gold nanorods and selective in situ deposition and etching mechanism, Au@SiO2@AgPt ternary metal nanostructures were constructed, and several novel superjunction hooks with different SERS enhancement and catalytic abilities were developed. And gave the appraisal. Finally, we choose the ternary metal assembly which integrates the advantages of SERS detection and nanometer catalysis, and realize the real-time monitoring of the catalytic reaction by SERS, which provides a new strategy for understanding the mechanism of the catalytic reaction. On the other hand, we have constructed a large scale ordered three-dimensional supercrystal based on gold and silver core-shell nanorods and applied it to the optical recognition of pathogenic microorganism E. coli. Compared with the traditional bacteria recognition technology, the current SERS spectrum technology can improve the sensitivity and accuracy of recognition.
【学位授予单位】：中国科学技术大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB383.1;O657.37

【共引文献】