激光生物学报, 2015, 24 (1): 90, 网络出版: 2015-06-26
基于波长寻址的表面等离子体共振传感技术
A Novel Surface Plasmon Resonance Sensing Technology Based on Wavelength-addressing
摘要
本文提出了基于光谱扫描技术的非机械扫描的表面等离子体共振(SPR)传感技术,采用白光为SPR激发光源,通过单色仪控制入射光的波长实现光谱寻址,在保证灵敏度和动态范围的同时,使系统在整个动态范围内具有较好的线性,简化了传感器结构.理论分析了光谱扫描SPR传感技术的灵敏度和动态范围,搭建了实验系统,并测量了不同浓度的酒精水混合溶液的SPR信号变化.结果表明:系统折射率测量范围为1.30-1.38,灵敏度可达3.1×105RIU.
Abstract
In this paper,a novel surface plasmon resonance(SPR)sensing technique with both a wide dynamic detection range and high sensitivity based on wavelength-addressing(WA-SPR)is presented.A white-light source is used for SPR excitation and the monochromator is used to address the resonance wavelength without any arm-scanning.The dynamic detection range and sensitivity of SPR sensor are theoretically analyzed respectively,and the principle setup is built.In order to test the effectiveness of our SPR sensor,we detect alcohol solutions with different concentration.Experimental results show that the sensitivity of our SPR sensor is 3.1×10-5 RIU with a refractive index range of 1.30-1.38.
耿小猛, 何建安, 顾大勇, 林居强, 陈荣, 屈军乐, 李学金, 邵永红. 基于波长寻址的表面等离子体共振传感技术[J]. 激光生物学报, 2015, 24(1): 90. GENG Xiaomeng, HE Jianan, GU Dayong, LIN Juqiang, CHEN Rong, QU Junle, LI Xuejin, SHAO Yonghong. A Novel Surface Plasmon Resonance Sensing Technology Based on Wavelength-addressing[J]. Acta Laser Biology Sinica, 2015, 24(1): 90.