Ag纳米片包覆ZnO纳米柱阵列构成的高活性SERS衬底用于快速痕量检测多氯联苯的研究

项目名称： Ag纳米片包覆ZnO纳米柱阵列构成的高活性SERS衬底用于快速痕量检测多氯联苯的研究

项目编号： No.21201168

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 无机化学

项目作者： 朱储红

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）作为严重危害生态环境与人类健康的持久性有机污染物，易生物富集、毒性高、降解难，其常规检测技术过程复杂、耗时，成本高，难以实现实时痕量监测。本项目基于表面增强拉曼散射(SERS)技术快速、实时探测痕量分子的原理，拟构筑对PCBs具有化学吸附能力以及高SERS灵敏性的Ag纳米片包覆ZnO纳米柱阵列，并研究Ag纳米片-ZnO纳米柱复合结构的参数与PCBs检测灵敏度的关系，改善制备工艺，调节结构参数，提高SERS衬底探测PCBs的灵敏性。在此基础上，选择合适的表面修饰剂对SERS衬底进行修饰以促进其捕获痕量PCBs，进一步提高其灵敏性实现痕量甚至超痕量检测PCBs。该项目的实施，有助于提高高灵敏性SERS衬底的制备技术，为利用SERS技术快速检测痕量甚至超痕量PCBs提供科学依据和技术支持。

中文关键词： 表面增强拉曼散射；多氯联苯；检测；贵金属；纳米结构

英文摘要： Polychlorinated biphenyls (PCBs), one kind of persistent organic pollutants, do enormous damage to ecological environment and human beings due to their easy bioaccumulation, high toxicity and hard degradation. The common techniques for PCBs detection are complicated, time-consuming, costly and difficult to real-time monitor. Based on the principle that SERS technique can rapidly detect trace molecules, we plan to fabricate Ag nanosheets coated ZnO nanopillar arrays that have chemical absorbability and extremly high SERS sensitivity to PCBs, study on the relation between the parameters of the Ag-nanosheet-ZnO-nanopillars composite nanostructures and their SERS sensitivity to PCBs, and then improve the fabrication technique and tune the structure parameters to improve the sensivity of the SERS substrate to PCBs. To further improve their sensitivity to PCBs and achieve trace or even ultra-trace detection of PCBs, we modify the SERS substrates with some organic agents to improve their ability to capture trace PCBs molecules. Carrying out this project will develop the technologies for constructing highly sensitive SERS substrates, and provide scientific basis and technical support for SERS-based rapid detection of trace or even ultra-trace PCBs.

英文关键词： surface-enhanced Raman scattering；polychlorinated biphenyls；detection；noble metal；nanostructure