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Paper-like graphene-Ag composite films with enhanced mechanical and electrical properties

Rungang Gao1, Nantao Hu1, Zhi Yang1*, Qirong Zhu2, Jing Chai1, Yanjie Su1, Liying Zhang1 and Yafei Zhang1*

Author Affiliations

1 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

2 Instrumental Analysis Center, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China

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Nanoscale Research Letters 2013, 8:32  doi:10.1186/1556-276X-8-32

Published: 17 January 2013

Abstract

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.

Keywords:
Graphene; Ag particles; Composite films; Graphene oxide; In situ reduction; Graphene paper; Electrical properties; Mechanical properties