多孔金纳米结构阵列的SERS效应检测痕量多氯联苯

项目名称： 多孔金纳米结构阵列的SERS效应检测痕量多氯联苯

项目编号： No.21207134

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 环境化学

项目作者： 许巧玲

作者单位： 中国科学院合肥物质科学研究院

项目金额： 25万元

中文摘要： 多氯联苯(PCBs)属持久性有机污染物，对环境和人类健康危害严重。传统的PCBs检测技术繁琐、灵敏度低、耗时长且成本高，因此，开发简便、廉价、快速、高精度的PCBs检测技术迫在眉睫。表面增强拉曼散射(SERS)技术具有简单、快捷、灵敏度高等优点，但同时存在两个关键难题：一是如何保证SERS信号的重复性；二是如何提高SERS基底的活性。本项目拟基于原电池原理在多孔阳极氧化铝模板中制备形貌和结构均一、有序的多孔金纳米结构阵列，采用该有序纳米结构阵列作为SERS基底，可以有效解决PCBs检测中SERS信号的重复性难题；同时，调控该SERS基底的形貌和结构，揭示不同结构参数的SERS基底与其活性之间的关联规律，优化基底形貌和结构，进而提高其SERS活性；最后，利用该高活性SERS基底实现对痕量PCBs的快速、简便、高精度检测。该项目的实施将为PCBs的实际环境检测提供理论依据和技术保障。

中文关键词： 有机污染物检测；多孔纳米结构；表面增强拉曼散射；；

英文摘要： Polychlorinated biphenyls (PCBs) are classified into the category of persistent organic pollutants, being harmful to environment and human health. Conventional detection methods for PCBs have low sensitivity and are generally complex, expensive, and time-consuming. Thus developing a simple, fast, economic, and sensitive method for trace detection of PCBs is exigent. Surface-enhanced Raman scattering (SERS) shows advantages of simplicity, rapidity and high sensitivity. However, the fabrication of highly sensitive and reproducible SERS substrates still remains a challenge. In this project, we will construct periodically arranged arrays of porous gold nanostructures inside the nanochannels of porous anodic aluminum oxide templates in a galvanic cell. Owning to the uniform morphologies of the porous gold nanostructure arrays, they will shows good reproducibility when used as SERS substrates for detecting PCBs. Meanwhile, to obtain SERS substrates with high sensitivity, we adjust the morphologies of the porous gold nanostructures and further reveal the relationship between their morphologies and the SERS performances. Finally, the porous gold nanostructure arrays are used as SERS substrates for simple, fast, and sensitive detection of trace PCBs. This project would facilitate the detection of PCBs in the real environ

英文关键词： Organic pollutant detection；Porous nanostructures；Surface-enhanced Raman scattering；；