Key Laboratory for Soft Chemistry and Functional Materials, Nanjing University of Science and Technology, Ministry of Education, Nanjing 210094, P. R China.
Small. 2009 Oct;5(19):2212-7. doi: 10.1002/smll.200900548.
Graphene-based sheets that possess a unique nanostructure and a variety of fascinating properties are appealing as promising nanoscale building blocks of new composites. Herein, graphene oxide sheets are used as the nanoscale substrates for the formation of silver-nanoparticle films. These silver-nanoparticle films assembled on graphene oxide sheets are flexible and can form stable suspensions in aqueous solutions. They can also be easily processed, forming macroscopic films with high reflectivity. Raman signals of graphene oxide in such hybrid films are increased by the attached silver nanoparticles, displaying surface-enhanced Raman scattering activity. The degree of enhancement can be adjusted by varying the quantity of silver nanoparticles on the graphene oxide sheets.
基于石墨烯的薄片具有独特的纳米结构和多种迷人的特性，作为新型复合材料有前途的纳米级构建块很有吸引力。在此，氧化石墨烯薄片被用作形成银纳米粒子薄膜的纳米级基底。这些组装在氧化石墨烯薄片上的银纳米粒子薄膜具有柔韧性，可以在水溶液中形成稳定的悬浮液。它们也很容易加工，形成具有高反射率的宏观薄膜。在这种混合薄膜中，氧化石墨烯的拉曼信号通过附着的银纳米粒子增强，显示出表面增强拉曼散射活性。通过改变氧化石墨烯片上银纳米粒子的数量，可以调节增强的程度。
