Graphene with the secondary amine-terminated zigzag edge as a line electron emitter

被引：8
|
作者：
Wang, Weiliang [1 ]
Li, Zhibing [1 ]
机构：
[1] Sun Yat Sen Univ, Sch Phys & Engn, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Guangdong, Peoples R China
来源：
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2012年 / 109卷 / 02期
基金：
中国国家自然科学基金;
关键词：
SINGLE-LAYER GRAPHENE; FIELD-EMISSION; WORK FUNCTION; CARBON; STATE; FILMS; MOLECULES; RIBBONS; ENERGY; GAS;
D O I：
10.1007/s00339-012-7180-3
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
An extraordinary low vacuum barrier height of 2.30 eV has been found on the zigzag-edge of graphene terminated with the secondary amine via the ab initio calculation. This edge structure has a flat band of edge states attached to the gamma point where the transversal kinetic energy is vanishing. We show that the field electron emission is dominated by the flat band. The edge states pin the Fermi level to a constant, leading to an extremely narrow emission energy width. The graphene with such edge is a promising line field electron emitter that can produce a highly coherent emission current.
引用
收藏
页码：353 / 356
页数：4
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