SERS活性液芯光纤的制备及超灵敏检测应用  

Preparation of SERS-Active Liquid Core Fiber and Its Application to the Ultrasensitive Detection

作　　者：徐蔚青[1] 徐抒平[1] 吕志成[1] 王魁香[2] 赵冰[1] 樊玉国[1] 

机构地区：[1]吉林大学超分子结构与材料教育部重点实验室 [2]吉林大学物理学院,长春130023

出　　处：《高等学校化学学报》2003年第11期2083-2085,共3页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金 (批准号 :2 0 2 73 0 2 2 ;2 0 173 0 19)资助

摘　　要：A novel ultrasensitive detection in a small volume of a low refractive index liquid via Surface enhanced Raman scattering(SERS)-active liquid core waveguide is described. The liquid core waveguide demonstrated was constructed by using the light-guiding silica capillary modified with SERS-active nanoparticles on the inner surface of the fiber wall. The Raman signal of the sample can be remarkably enhanced by the immobilized Ag nanoparticles. The laser and SERS scattering from the flowing liquid in the core possess the totally reflective waveguide model within the fiber wall. Thus, the sample dissolved in the low refractive index liquid, e.g. methanol, can be quantitatively monitored by Raman spectra in the liquid core cell and the detection limit can reach 10 -8 mol/L.A novel ultrasensitive detection in a small volume of a low refractive index liquid via Surface enhanced Raman scattering(SERS)-active liquid core waveguide is described. The liquid core waveguide demonstrated was constructed by using the light-guiding silica capillary modified with SERS-active nanoparticles on the inner surface of the fiber wall. The Raman signal of the sample can be remarkably enhanced by the immobilized Ag nanoparticles. The laser and SERS scattering from the flowing liquid in the core possess the totally reflective waveguide model within the fiber wall. Thus, the sample dissolved in the low refractive index liquid, e.g. methanol, can be quantitatively monitored by Raman spectra in the liquid core cell and the detection limit can reach 10 -8 mol/L.

关 键 词：SERS 液芯光纤 制备 超灵敏检测 表面增强拉曼光谱 光谱分析 

分 类 号：O657.37[理学—分析化学]