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Title of Journal: Appl Phys A

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Abbravation: Applied Physics A

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Springer-Verlag

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DOI

10.1002/lipi.19200271701

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1432-0630

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Graphene with the secondary amineterminated zigza

Authors: Weiliang Wang Zhibing Li
Publish Date: 2012/09/14
Volume: 109, Issue: 2, Pages: 353-356
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Abstract

An extraordinary low vacuum barrier height of 230 eV has been found on the zigzagedge 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 currentThe project was supported by the National Basic Research Program of China Grant Nos 2007CB935500 and 2008AA03A314 the National Natural Science Foundation of China Grant Nos 11104358 and 11274393 the highperformance grid computing platform of Sun Yatsen University the Guangdong Province Key Laboratory of Computational Science and the Guangdong Province Computational Science Innovative Research Team

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