Field Emission from Few-Layer Graphene Nanosheets Produced by Liquid Phase Exfoliation of Graphite

被引：41
|
作者：
Dong, Jianhui [1 ]
Zeng, Baoqing [1 ]
Lan, Yucheng [2 ]
Tian, Shikai [1 ]
Shan, Yun [1 ]
Liu, Xingchong [1 ]
Yang, Zhonghai [1 ]
Wang, Hui [2 ]
Ren, Z. F. [2 ]
机构：
[1] Univ Elect Sci & Technol China, Natl Lab Vacuum Elect, Sch Phys Elect, Chengdu 610054, Peoples R China
[2] Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA
来源：
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2010年 / 10卷 / 08期
关键词：
Graphene; Field Emission; Vacuum Microelectronic;
D O I：
10.1166/jnn.2010.2432
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Graphene nanosheets have been synthesized from commercial expandable graphite by heating in a microwave oven and dispersing in ethanol by ultrasonication. Scanning and transmission electron microscopy and electron energy-loss spectroscopy and atomic force microscope showed that the nanosheets were about 2 nm in thickness and 10 mu m in diameter. The field emission of the graphene sheets has been investigated. An emission current density of 1 mA/cm(2) has been achieved at an electric field of 3.7 V/mu m with a turn-on field of 1.7 V/mu m at 0.01 mA/cm(2). The annealing of the samples at 400 degrees C in vacuum greatly improved the field emission performance.
引用
收藏
页码：5051 / 5055
页数：5
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