光纤LSPR传感器检测多元重金属的指纹识别与波长调控机理研究

项目名称： 光纤LSPR传感器检测多元重金属的指纹识别与波长调控机理研究

项目编号： No.61307099

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 文晓艳

作者单位： 武汉理工大学

项目金额： 26万元

中文摘要： 汞、镉、镍等重金属离子污染是危害人类健康的全球性环境问题，多种离子并存、浓度时空分布离散是其突出特征。研究多元重金属离子的同步在线传感技术具有重要意义，其中传感器敏感材料的识别精度与同步识别可控程度是其关键问题。本项目基于金纳米棒(GNR) LSPR共振的微区敏感与波长-颗粒尺寸相关性，拟开展光纤LSPR传感器同步检测多元重金属离子的指纹识别与波长调控机理研究。拟利用离散偶极近似(DDA)理论分析GNR的 LSPR的共振特性，引入形变因子、偶极作用函数分析颗粒团聚、形变对LSPR指纹识别的影响机制；分析GNR颗粒尺寸对LSPR波长的调控规律，揭示颗粒团聚、形变对LSPR波长调控的干扰特性；研究GNR尺寸可控生长与降低颗粒团聚、形变的材料制备关键技术；构建多元同步在线传感系统测试传感性能；分析残存团聚、形变下的检测误差并探讨修正方案，以为实现多元重金属离子的同步在线传感提供理论与实验依据。

中文关键词： 局域表面等离子共振；金纳米棒；重金属离子；指纹识别；

英文摘要： Heavy metals ions pollution (mercury, cadmium, copper, etc.) is a global environmental problem hurting human health. Multiple ions coexisting and ions concentration space-time distribution discretization are the prominent features.It is necessary to carry out research on synchronously on-line sensing technique aiming at detection of multiple heavy metal ions. The key issues are the recognition precision and independently controllable extent of sensing materials for the sensor. The present research project will focus on the study of fingerprint recognition and wavelength control mechanism of localized surface plasmon resonance (LSPR) based optical fiber sensor, which is stimulated by the intrinsic micro zone sensitivity and size dependent LSPR wavelength of gold nanorods (GNR). Discrete dipole approximation (DDA) theory will be applied to the simulation of recognizing feature and wavelength control regularity, on which the influence of deformation and aggregation of GNR particles will be analyzed by introduction of shape factor as well as dipolar coupling function. The relationship between LSPR wavelength and particle size will be built up, and the influence of aggregation and deformation on wavelength will be revealed. Based on DDA theoretical analysis GNR with controllable deformation and aggregation will be sy

英文关键词： LSPR；Gold nanorods；Heavy metals ions；Fingerprint Recognition；