Tuning the Graphene Work Function by Electric Field Effect

被引:1266
作者
Yu, Young-Jun [1 ,2 ]
Zhao, Yue [1 ]
Ryu, Sunmin [3 ]
Brus, Louis E. [3 ]
Kim, Kwang S. [2 ]
Kim, Philip [1 ]
机构
[1] Columbia Univ, Dept Phys, 538 W 120th St, New York, NY 10027 USA
[2] Pohang Univ Sci & Technol, Dept Chem, Ctr Superfunct Mat, Pohang 790784, South Korea
[3] Columbia Univ, Dept Chem, New York, NY 10027 USA
关键词
SUSPENDED GRAPHENE; GRAPHITE; SPECTROSCOPY; FILMS;
D O I
10.1021/nl901572a
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
We report variation of the work function for single and bilayer graphene devices measured by scanning Kelvin probe microscopy (SKPM). By use of the electric field effect, the work function of graphene can be adjusted as the gate voltage tunes the Fermi level across the charge neutrality point, Upon biasing the device, the surface potential map obtained by SKPM provides a reliable way to measure the contact resistance of individual electrodes contacting graphene.
引用
收藏
页码:3430 / 3434
页数:5
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