高灵敏度锥形光纤SERS探针及其在农残检测中的应用  

High Sensitivity Tapered Fiber SERS Probe and Its Application on Pesticide Residues Detection

作　　者：雷星 刘晔 黄竹林 姚波 毛庆和 

机构地区：[1]中国科学院安徽光学精密机械研究所安徽省光子器件重点实验室,安徽合肥230031 [2]中国科学院固体物理研究所材料物理重点实验室安徽省纳米材料和纳米技术实验室,安徽合肥230031

出　　处：《光学学报》2015年第8期42-48,共7页Acta Optica Sinica

基　　金：国家973计划(2013CB934304);国家自然科学基金(61377044;61275186;11104282)

摘　　要：实验研究了激光诱导化学沉积法(LICDM)中诱导激光功率及诱导时间对锥形光纤表面增强拉曼散射(SERS)探针性能的影响。通过优化激光诱导功率为90 m W、诱导时间为50 min,制备出高灵敏度的锥形光纤SERS探针,结合便携式拉曼光谱仪实现了1.0×10-7mol/L甲基对硫磷(MP)的检测;该方法制备的探针对MP的SERS光谱检测具有良好的重复性。这种高灵敏度、可重复性好的锥形光纤SERS探针在农残现场检测、定量分析等方面具有潜在的应用前景。The influences of induced laser power and reaction time on the properties of tapered fiber surface enhanced Raman scattering （SERS） probes by the laser induced chemical deposition method （LICDM） are studied in experiments. Under an optimized experimental conditions as 90 mW induced laser power and 50 min reaction time, the prepared taper fiber SERS probes possess the highest sensitivity, when detecting a low concentration as 1.0 ×10^- 7 mol/L of methyl parathion （MP） solution with a portable Raman spectrometer. Moreover, the prepared probes with LICDM show good repeatability for SERS detections, which may have potentials on rapid and field detection of pesticide residues.

关 键 词：光纤光学 锥形光纤SERS探针 激光诱导化学沉积法 表面增强拉曼散射 甲基对硫磷 

分 类 号：TN248.1[电子电信—物理电子学]