Fabrication of Graphene Probes by Solid Carbon Source and Applications in Thermionic Field Emission and Scanning Tunneling Microscopy
Tzu-Hua Chen1*, Po-Kai Chiu1, Wei-Jung Chen1, Li-Jie Chen1, Tsung-Hui Tsai1
1Institute of Optoelectronic Sciences, National Taiwan Ocean University, Keelung, Taiwan
* presenting author:Po-Kai Chiu, email:tyshkenny@gmail.com
Graphene has been explosively studied due to its 2-D structure and unique physical properties. We report a fabrication method of graphene probes using camphor via CVD. We have studied thermionic field emission from tungsten filament embedded with graphene probes as electron sources. The results shows high current density and large electron beam brightness were observed. In addition, graphene probe can be used in scanning tunneling microscope (STM) as a powerful tool on single-molecule experiment which can confine single molecular to contact graphene electrodes to enhance the electric measurement via such structure. Our study shows the potential of freestanding graphene edge can be a great electron source in thermionic field emission and ultra-thin electrode for single-molecule experiment.

Keywords: Graphene, thermionic field emission, STM, molecule electronics