Surface-enhanced Raman scattering in femtosecond laser-nanostructured Ag substrate
Surface-enhanced Raman scattering in femtosecond laser-nanostructured Ag substrate
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DOI：
10.1088/1742-6596/276/1/012015
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发表时间：
2011-02
期刊：
影响因子：
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通讯作者：
Ye Dai;M. He;B. Lu;Xiaona Yan;G. Ma
中科院分区：
文献类型：
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作者：
Ye Dai;M. He;B. Lu;Xiaona Yan;G. Ma
我们证明了利用飞秒激光微细加工技术可以在银膜表面直接制备表面增强拉曼散射(SERS)衬底。根据扫描电子显微镜的形貌观察，在烧蚀区域内形成了大量的纳米颗粒、纳米突起和纳米棒，这些纳米颗粒的密度和尺寸分布可能与入射激光强度有关。此外，通过快速线扫描产生了大面积的纳米结构区域，样品在罗丹明6G溶液中浸泡30min后，该区域的增强因子为~105。
We demonstrate that a surface-enhanced Raman scattering (SERS) substrate could be directly fabricated on the surface of Ag film by femtosecond laser micromachining. According to the morphology observation by SEM, an amount of nanoparticles, nanoprotrusions, and nanospikes were found to form in the ablation region and the density and size distribution of these Ag nanoparticles depended possibly on the incident laser intensity. Additionally, a large area of nanostructured region was produced by fast line scanning, and an enhancement factor of ~105 was obtained in this region after the sample was soaked in the rhodamine 6G solution for 30 min.