Key Laboratory for Thin Film and Microfabrication of Ministry of Education, Research Institute of Micro/Nano Science and Technology, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China.
Nanoscale Res Lett. 2013 Jan 17;8(1):32. doi: 10.1186/1556-276X-8-32.
In this paper, we have reported that paper-like graphene-Ag composite films could be prepared by a facile and novel chemical reduction method at a large scale. Using ascorbic acid as a reducing agent, graphene oxide films dipped in Ag+ aqueous solutions can be easily reduced along with the decoration of different sizes of Ag particles distributed uniformly. The results reveal that the obtained films exhibit improved mechanical properties with the enhancement of tensile strength and Young's modulus by as high as 82% and 136%, respectively. The electrical properties of graphene-Ag composite films were studied as well, with the sheet resistance of which reaching lower than approximately 600 Ω/□. The graphene-Ag composite films can be expected to find interesting applications in the area of nanoelectronics, sensors, transparent electrodes, supercapacitors, and nanocomposites.
本文报道了一种简便、新颖的化学还原方法，可大规模制备类纸状的石墨烯-银复合薄膜。采用抗坏血酸作为还原剂，将氧化石墨烯薄膜浸泡在含银离子的水溶液中，可方便地进行还原，同时均匀分布着不同尺寸的银颗粒。结果表明，所制备的薄膜具有更好的机械性能，拉伸强度和杨氏模量分别提高了 82%和 136%。此外，还研究了石墨烯-银复合薄膜的电学性能，其方阻可低至 600 Ω/□以下。石墨烯-银复合薄膜有望在纳米电子学、传感器、透明电极、超级电容器和纳米复合材料等领域得到应用。
