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

页码：5051 / 5055

页数：5

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