Wang Jing, Hu Zhaoyi, Li Rui, Liu Xiongjun, Xu Chuan, Wang Hui, Wu Yuan, Fu Engang, Lu Zhaoping
State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing 100083, People's Republic of China.
Nanotechnology. 2018 May 4;29(18):184001. doi: 10.1088/1361-6528/aab005. Epub 2018 Feb 16.
In this work, effects of Au ion irradiation on microstructure and surface-enhanced Raman scattering (SERS) performance of nanoporous copper (NPC) were investigated. It is found that the microstructure of NPC could be tailored by the ion irradiation dose, i.e., the pore size decreases while the ligament size significantly coarsens with the increase of the irradiation dose. In addition, the SERS enhancement for rhodamine 6G molecules was improved by Au ions irradiation at an appropriate dose. The underlying mechanism of the increase of SERS enhancement resulted from ion irradiation was discussed. Our findings could provide a new way to tune nanoporosity of nanoporous metals and improve their SERS performance.
在本工作中，研究了金离子辐照对纳米多孔铜（NPC）微观结构和表面增强拉曼散射（SERS）性能的影响。发现NPC的微观结构可通过离子辐照剂量进行调控，即随着辐照剂量的增加，孔径减小而韧带尺寸显著变粗。此外，在适当剂量的金离子辐照下，罗丹明6G分子的SERS增强效果得到改善。讨论了离子辐照导致SERS增强增加的潜在机制。我们的研究结果可为调控纳米多孔金属的纳米孔隙率并改善其SERS性能提供一种新方法。
