In this paper, we present a novel type of surface-enhanced Raman spectroscopy (SERS) substrates using the surface of microsphere end-shape optical fibre coated silver nanodendrites fabricated by laser-assisted photochemical method, which can one-timely synthesis and deposit nano-silver on the surface of microsphere. The morphology and chemical composition of SERS microsphere-shape optical fibre substrates characterized by field emission scanning electron microscope (FE-SEM) and energy dispersive X-ray (EDX), respectively, show that the Ag nanodendrites coated on the surface of microspherical end-shape have excellent reproducibility and stability in the morphology and structures. The SERS-activity of microsphere end-shape optical fibre substrates has been tested by ultralow concentration of Rhodamine 6 G and detected Dimethoate pesticide in the low-concentration range of 0.005 ppm–4 ppm with Limit of Detection (LOD) of 0.002 ppm. This study indicated that SERS substrate based on microsphere end-shape optical fibre coupled with silver nanodendrites is a large potential tool for applications in high sensitive chemo-sensing technique.

在本文中，我们介绍了一种新型的表面增强拉曼光谱（SERS）衬底，该衬底使用通过激光辅助光化学方法制备的微球端形光纤涂覆的银纳米树突的表面，可以一次合成并沉积纳米级。微球表面上的银。分别通过场发射扫描电子显微镜（FE-SEM）和能量色散X射线（EDX）表征的SERS微球状光纤基底的形貌和化学组成表明，在微球端表面镀有Ag纳米树枝状。形状在形态和结构上具有出色的可复制性和稳定性。已经通过超低浓度的若丹明6 G测试了微球端状光纤基质的SERS活性，并在0.005 ppm-4 ppm的低浓度范围内检测到乐果农药，检测限（LOD）为0.002 ppm。这项研究表明，基于微球端形光纤和银纳米树突的SERS基板是在高灵敏度化学传感技术中应用的巨大潜力。