Edge field emission of large-area single layer graphene

被引:45
作者
Kleshch, Victor I. [1 ]
Bandurin, Denis A. [1 ]
Orekhov, Anton S. [1 ,2 ]
Purcell, Stephen T. [3 ,4 ]
Obraztsov, Alexander N. [1 ,5 ]
机构
[1] Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119991, Russia
[2] RAS, AV Shubnikov Crystallog Inst, Moscow 119333, Russia
[3] Univ Lyon 1, ILM, F-69622 Villeurbanne, France
[4] CNRS, UMR 5586, F-69622 Villeurbanne, France
[5] Univ Eastern Finland, Dept Math & Phys, Joensuu 80101, Finland
基金
俄罗斯科学基金会;
关键词
Graphene; Field emission; Microelectromechanical systems; ELECTRON-EMISSION; SELF-OSCILLATIONS; INDIVIDUAL GRAPHENE; CARBON NANOTUBES; FILMS; EMITTER; OXIDE;
D O I
10.1016/j.apsusc.2015.09.160
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Field electron emission from the edges of large-area (similar to 1 cm x 1 cm) graphene films deposited onto quartz wafers was studied. The graphene was previously grown by chemical vapour deposition on copper. An extreme enhancement of electrostatic field at the edge of the films with macroscopically large lateral dimensions and with single atom thickness was achieved. This resulted in the creation of a blade type electron emitter, providing stable field emission at low-voltage with linear current density up to 0.5 mA/cm. A strong hysteresis in current-voltage characteristics and a step-like increase of the emission current during voltage ramp up were observed. These effects were explained by the local mechanical peeling of the graphene edge from the quartz substrate by the ponderomotive force during the field emission process. Specific field emission phenomena exhibited in the experimental study are explained by a unique combination of structural, electronic and mechanical properties of graphene. Various potential applications ranging from linear electron beam sources to microelectromechanical systems are discussed. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码:1967 / 1974
页数:8
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