Jing Zhiyu, Zhang Ling, Xu Xiaofei, Zhu Shengli, Zeng Heping
School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.
School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China.
Nanomaterials (Basel). 2022 Apr 25;12(9):1455. doi: 10.3390/nano12091455.
Surface-enhanced Raman scattering (SERS) technology can amplify the Raman signal due to excited localized surface plasmon (LSP) from SERS substrates, and the properties of the substrate play a decisive role for SERS sensing. Several methods have been developed to improve the performance of the substrate by surface modification. Here, we reported a surface modification method to construct carbon-coated nanoporous gold (C@NPG) SERS substrate. With surface carbon-assistant, the SERS ability of nanoporous gold (NPG) seriously improved, and the detection limit of the dye molecule (crystal violet) can reach 10 M. Additionally, the existence of carbon can avoid the deformation of the adsorbed molecule caused by direct contact with the NPG. The method that was used to improve the SERS ability of the NPG can be expanded to other metal structures, which is a convenient way to approach a high-performance SERS substrate.
表面增强拉曼散射（SERS）技术可通过SERS基底激发的局域表面等离子体（LSP）来放大拉曼信号，且基底的性质对SERS传感起着决定性作用。已经开发了几种通过表面修饰来提高基底性能的方法。在此，我们报道了一种表面修饰方法来构建碳包覆纳米多孔金（C@NPG）SERS基底。通过表面碳辅助，纳米多孔金（NPG）的SERS能力得到显著提高，染料分子（结晶紫）的检测限可达到10 M。此外，碳的存在可避免吸附分子因与NPG直接接触而发生变形。用于提高NPG的SERS能力的方法可扩展到其他金属结构，这是获得高性能SERS基底的一种便捷途径。
