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实验研究了激光诱导化学沉积法(LICDM)制备锥形光纤表面增强拉曼散射(SERS)探针及其SERS检测性能。结果表明,因不同角度光纤探针锥面出射光场分布不同,导致了LICDM在制备小锥角光纤探针时沉积纳米颗粒的困难,但是通过延长反应时间,利用银纳米颗粒的光散射效应可改善小角度光纤探针表面纳米颗粒的制备效果。实验利用100mW的诱导激光,在0.005mol/L反应液中,经60min沉积,制备出了不同锥角的光纤探针。对光纤探针的测试结果表明,锥角为8.2°的光纤探针所测得的SERS频移峰及其荧光背景的幅度最大,且该角度在不同SERS激发光功率下基本不变。
The conical fiber surface enhanced Raman scattering (SERS) probe prepared by laser induced chemical deposition (LICDM) and its SERS detection performance were experimentally studied. The results show that due to the different optical field distributions of the fiber probe cones, LICDM has difficulty in depositing nanoparticles with small cone angle fiber probes. However, by lengthening the reaction time and utilizing the light scattering effect of the silver nanoparticles, Improve the Preparation Effect of Nanoparticle on Small Angle Fiber Probe Surface. Experiments using 100mW induced laser in 0.005mol / L reaction solution, deposited by 60min, prepared with different cone angle of the optical fiber probe. The test results of the fiber probe showed that the amplitude of the SERS shift peak and the fluorescence background measured by the fiber probe with a cone angle of 8.2 ° are the largest, and the angle is substantially unchanged under different SERS excitation light powers.