FENG Ying, HUANG Shi-hua, KANG Kai, DUAN Xiao-xia. Preparation and characterization of graphene and few-layer graphene. New Carbon Mater., 2011, 26(01): 26-30.
Citation:
FENG Ying, HUANG Shi-hua, KANG Kai, DUAN Xiao-xia. Preparation and characterization of graphene and few-layer graphene. New Carbon Mater., 2011, 26(01): 26-30.
FENG Ying, HUANG Shi-hua, KANG Kai, DUAN Xiao-xia. Preparation and characterization of graphene and few-layer graphene. New Carbon Mater., 2011, 26(01): 26-30.
Citation:
FENG Ying, HUANG Shi-hua, KANG Kai, DUAN Xiao-xia. Preparation and characterization of graphene and few-layer graphene. New Carbon Mater., 2011, 26(01): 26-30.
Beijing Jiaotong University, Institute of Optoelectrical Technology, Beijing 100044, China
Funds:
National Outstanding Youth Science Foundation of China(60825407); National Natural Science Foundation of China(60877025); Beijing Science and Technology Committee (Z08000303220803); Beijing Natural Science Fund Project (2092024); Beijing Jiaotong University Fund (2007XM048).
FENG Ying (1982-), female, Ph.D.Candidate, engaged in the study of low dimensional carbon materials and their electronic devices. Tel: +86-10-51466793, E-mail: 05118310@bjtu.edu.cn
Few-layer graphene was prepared from highly oriented pyrolytic graphite by micromechanical cleavage and transferred to the silicaon coated with silicon dioxide (SiO2/Si). The thickness of graphene on the SiO2/Si support was investigated by color and contrast variations under an optical microscope. Atomic force microscopy and Raman spectroscopy were used to determine the number of layers. Results show that a monolayer, double layers and multiple layers of graphene were prepared. The optical microscope images can give a satisfactory identification of the graphene thickness on SiO2/Si. In the Raman spectrum the 2D band is narrower and G band is weaker for double layers than that for multiple layers. Chemical vapor deposition was also used to grow large area (~cm2) graphene. However, micromechanical cleavage is a more simple method to prepare graphene.