Fabrication of graphene by solid carbon sources
Guo-Wei Cheng1, Kai-Wen Chiu1, Jing Peng1, Po-kai Chiu1, Tzu-Hua Chen1, Jeff Tsung-Hui Tsai1*
1Institute of Optoelectronic Sciences, National Taiwan Ocean University, Keelung, Taiwan
* presenting author:蔡宗惠, email:thtsai@mail.ntou.edu.tw
Graphene fabrication by solid carbon sources was demonstrated via thermal chemical vapor deposition in vacuum furnace using camphor and arc-discharge assisted with an embedded high temperature furnace using graphite. The optimal fabrication condition was based on the observations of scanning electron microscopy, and Raman spectroscopy to determine through a series of experiments on various ambient conditions.

Our approach is using camphor as the solid carbon source to prepare graphene. The result shows the fairly good quality of multi-layer graphene was fabricated by such thermal CVD when examed the product from Raman spectroscopy with a value of I2D/IG in 0.76. The alternative approach by thermal assisted an vacuum arc from the solid carbon sources of graphite. By identifying the I2D/IG at 1.81 from the Raman spectrum, we concluded that the deposition of large area graphene on Cu was achieved. With the assistance of the high temperature from the embedded mini furnace near the arc zone with the vacuum arc system, the single layer graphene was obtained at a 40 A ignition current of carbon vacuum arc. The result of our approach offers a safe fabrication process to prepare graphene from solid carbon sources instead of explosive hydrocarbon gases.

Keywords: graphene, arc discharge , raman spectroscopy, scanning electron microscopy