Optical fiber surface-enhanced Raman scattering (SERS) probes provide a novel platform for liquid-phase in situ and remote SERS detections. However, it is still a challenge to fabricate noble metal nanostructures with large SERS enhancement factor (EF) onto optical fiber surfaces. In this article, we successfully prepare Au-nanorod cluster structures on optical fiber facets by a laboratory-developed laser-induced evaporation self-assembly method. It is demonstrated that the optimized optical fiber SERS probes show high detection sensitivity (10⁻¹⁰ M for rhodamine 6G solution, and 10⁻⁸ M for malachite green or crystal violet solution) and excellent reproducibility (relative standard deviation less than 6%). As the laser-induced evaporation self-assembly method is a simple and low-cost method capable of achieving automatic and reproducible preparations of cluster patterned optical fiber SERS probes, this work may find important application prospects in various liquid-phase SERS detection areas.

中文翻译：

---

激光诱导蒸发自组装法制备金纳米簇图案光纤SERS探针

光纤表面增强拉曼散射（SERS）探针为液相原位和远程SERS检测提供了一个新颖的平台。然而，在光纤表面上制造具有大SERS增强因子（EF）的贵金属纳米结构仍然是一个挑战。在本文中，我们通过实验室开发的激光诱导蒸发自组装方法成功地在光纤面上制备了金纳米线簇结构。结果表明，优化的光纤SERS探针显示出高检测灵敏度（若丹明6G溶液为10 ^-10 M，10 ^-8为10 ^-8 MM用于孔雀石绿或结晶紫溶液）和优异的重现性（相对标准偏差小于6％）。由于激光诱导蒸发自组装法是一种简单，低成本的方法，能够实现簇样光纤SERS探针的自动和可重复制备，因此这项工作可能会在各种液相SERS检测领域中找到重要的应用前景。