新型凹锥形表面增强拉曼散射光纤探针的制备

研制了一种新型凹锥形表面增强拉曼散射（SERS）光纤探针，研究了光纤探针凹锥形结构的制备方法，分析了凹锥光纤探针形貌与腐蚀时间的关系，通过化学自组装法将金纳米颗粒固化到凹锥内表面，制成凹锥SERS光纤探针，并测试了其远程SERS检测性能。结果表明，凹锥形光纤探针具有更低的光纤拉曼光谱背底，约为同种光纤制备的锥形探针的1/3；在633 nm的激发波长下，固化金纳米颗粒的凹锥探针对于罗丹明6G（R6G）溶液的拉曼光谱远程检测浓度低至100 nmol/L。这种凹锥形结构使基底不易脱落，探针不易损坏。基于上述优点，该种凹锥形光纤探针可能在SERS远程检测领域具有潜在的应用价值。

Abstract

A novel concave cone surface-enhanced Raman scattering (SERS) fiber probe modified with the gold nanoparticles was demonstrated. We studied the preparation method of the concave cone fiber probes, analyzed the relationship between the morphology of the probe and the corrosion time, modified the gold nanoparticles onto the inner surface of the concave cone by the chemical self-assembly method, and tested the SERS detection performance of the prepared probe. Experimental results show that the concave cone fiber probe has a lower fiber Raman background, about 1/3 of the tapered probe prepared with the same fiber. With 633 nm excitation, Raman spectra of rhodamine 6G (R6G) aqueous solution of 100 nmol/L can be detected by the concave cone fiber probes modified with gold nanoparticles. Due to this concave cone structure, the metal nanoparticles are more difficult to fall off, and the probe has better damage resistance. Based on the above advantages, this type of concave cone fiber probe may have potential application value in the field of SERS remote detection.

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杜怀超, 陈振宜, 陈娜, 刘华健, 徐文杰, 张恒, 刘书朋, 王廷云. 新型凹锥形表面增强拉曼散射光纤探针的制备[J]. 中国激光, 2017, 44(2): 0213001. Du Huaichao, Chen Zhenyi, Chen Na, Liu Huajian, Xu Wenjie, Zhang Heng, Liu Shupeng, Wang Tingyun. Fabrication of a Novel Concave Cone Surface-Enhanced Raman Scattering Fiber Probe[J]. Chinese Journal of Lasers, 2017, 44(2): 0213001.

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