Nanomanufacturing of Graphene Nanosheets Through Hole Engineering

Chen, Yanan ; Wang, Yilin ; Zhu, Shuze ; Fu, Kun ; Han, Xiaogang ; Wang, Yanbin ; Zhao, Bin ; Li, Tian ; Liu, Boyang ; Li, Yiju(Maryland Univ, Dept of Materials Science and Engineering, College Park, MD, United States)

关键词: GRAPHENE;    FABRICATION;    ELECTRICAL RESISTIVITY;    LIQUIDS;    HIGH TEMPERATURE;    NANOSTRUCTURES (DEVICES);    SOLVENTS;   

RP-ID  :  NF1676L-30050

学科分类：材料科学（综合）

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

Facile and scalable fabrication of highly dense and high quality graphene films and articles is extremely attractive for a range of electronic and mechanical applications. Pristine, high quality graphene with its inherent impermeability poses challenges in fabricating dense films and thick parts with high electrical conductivity due to the difficulty in removing trapped air and/or solvents used in various fabrication methods. To overcome this deficiency, nano-holes were intentionally created in pristine graphene (“holey graphene”) with an average diameter of approximately 15 nm. The holes serve as pathways for the rapid removal of gases or liquids and enable the fabrication of dense holey graphene nanostructures. Subsequently, a high temperature process is applied to effectively repair the nano-holes and recover the high quality graphene conjugated network. Through the creation and repair of the nano-holes, dense graphene articles were created that exhibited an ultrahigh conductivity of 2209 S/cm and a high carrier mobility of 673 cm2V-1s-1. This unique processing methodology enables the facile and scalable fabrication of high quality graphene constructs for a variety of applications.