Modification of the electronic structures of graphene by viologen

被引：34

作者：

Jeong, Hae Kyung ^{[1
]}

Kim, Ki-Jeong ^{[2
]}

Kim, Soo Min ^{[3
]}

Lee, Young Hee ^{[3
]}

机构：

[1] Daegu Univ, Dept Phys, Gyongsan 712714, South Korea

[2] Pohang Accelerator Lab, Beamline Res Div, Pohang 790784, South Korea

[3] Sungkyungkyun Univ, Ctr Nanotubes & Nanostructured Composites, Sungkyunkwan Adv Inst Nanotechnol, Dept Energy Sci,Div Phys BK21, Suwon 440746, South Korea

来源：

CHEMICAL PHYSICS LETTERS | 2010年 / 498卷 / 1-3期

关键词：

GRAPHITE OXIDE; REDUCTION; SUBSTRATE;

D O I：

10.1016/j.cplett.2010.08.065

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：

Electronic band structures of viologen-doped graphene have been investigated. Pristine graphene film, synthesized by chemical vapor deposition (CVD), showed numerous oxygen-related functional groups, and was annealed to remove oxygen content. Two species of viologen, di-cationic and mono-cationic, were observed in the viologen-doped graphene. The work function of the CVD graphene was dramatically decreased by 1.1 eV after viologen doping. Viologen, therefore, is a strong n-type dopant for graphene, and this report shows the first direct evidence of changing the work function of viologen-doped graphene by cutting-off the kinetic energy of secondary electrons. (C) 2010 Elsevier B. V. All rights reserved.

引用

页码：168 / 171

页数：4

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