在铜箔上制备 Ag/Cu2S 复合微纳结构及其表面增强拉曼散射性能
Fabrication and SERS properties of Ag/Cu2S composite micro-nanostructures over Cu foil.
机构信息
State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Qianjin Street 2699, Changchun 130012, PR China.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2011 Sep;79(5):1247-50. doi: 10.1016/j.saa.2011.04.050. Epub 2011 Apr 22.
A new kind of Ag/Cu2S composite micro/nanostructures has been prepared via a convenient galvanic reduction method. SEM images of these micro/nanostructures showed that Ag nanoparticles with the size of around 50-100 nm were well deposited on the surface of Cu2S micro/nanostructures. The SEM images also indicated that the Ag nanoparticles were preferentially grown on the big polygonal Cu2S microstructures, which could be explained by a localization of the electrons on the surface of the polygonal Cu2S microstructures after the electron transfer step. Owing to the introduction of Ag nanoparticles on the surface of Cu2S micro/nanostructures, the resulting Ag/Cu2S composite micro-nanostructures could be used as a versatile substrate for surface enhanced Raman scattering.
一种新型的 Ag/Cu2S 复合微/纳米结构通过一种简便的电还原方法制备。这些微/纳米结构的 SEM 图像显示，尺寸约为 50-100nm 的 Ag 纳米颗粒很好地沉积在 Cu2S 微/纳米结构的表面上。SEM 图像还表明，Ag 纳米颗粒优先在大的多边形 Cu2S 微结构上生长，这可以通过电子转移步骤后多边形 Cu2S 微结构表面上的电子定位来解释。由于在 Cu2S 微/纳米结构的表面上引入了 Ag 纳米颗粒，所得的 Ag/Cu2S 复合微-纳米结构可以用作表面增强拉曼散射的通用基底。
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