Chemical Doping of Epitaxial Graphene by Organic Free Radicals

被引：60

作者：

Choi, Junghun ^{[2
]}

Lee, Hangil ^{[1
]}

Kim, Ki-jeong ^{[3
]}

Kim, Bongsoo ^{[3
]}

Kim, Sehun ^{[2
]}

机构：

[1] Sookmyung Womens Univ, Dept Chem, Seoul 140742, South Korea

[2] Korea Adv Inst Sci & Technol, Dept Chem, Mol Level Interface Res Ctr, Taejon 305701, South Korea

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

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2010年 / 1卷 / 02期

关键词：

ELECTRONIC-STRUCTURE; CARBON NANOTUBES; ATOMIC-HYDROGEN; FUNCTIONALIZATION; MOLECULES; CHEMISTRY; GAS;

D O I：

10.1021/jz900351w

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：

Chemical doping of epitaxial graphene (EG) by organic free radicals (4-amino-2,2,6,6-tetramethyl-1-piperridinyloxy; 4-amino-TEMPO) was investigated using scanning tunneling microscopy (STM), scanning tunneling spectroscopy (STS), and high resolution photoemission spectroscopy (HRPES). STM images revealed that the empty density of states near the adsorption site significantly decreased as a result of radical doping. STS indicated that 4-amino-TEMPO radicals acted as n-type doping characteristics.

引用

页码：505 / 509

页数：5

共 41 条

[1] Interface dipoles arising from self-assembled monolayers on gold: UV-photoemission studies of alkanethiols and partially fluorinated alkanethiols [J].

Alloway, DM ;

Hofmann, M ;

Smith, DL ;

Gruhn, NE ;

Graham, AL ;

Colorado, R ;

Wysocki, VH ;

Lee, TR ;

Lee, PA ;

Armstrong, NR .

JOURNAL OF PHYSICAL CHEMISTRY B, 2003, 107 (42) :11690-11699

[2] A SIMPLE AND SPECIFIC METHOD OF ATTACHING MOLECULES TO GRAPHITE [J].

AVIRAM, A ;

LI, L ;

POMERANTZ, M ;

ROLAND, PA ;

SCHROTT, AG .

LANGMUIR, 1995, 11 (06) :2049-2053

[3] Atomic Hydrogen Adsorbate Structures on Graphene [J].

Balog, Richard ;

Jorgensen, Bjarke ;

Wells, Justin ;

Laegsgaard, Erik ;

Hofmann, Philip ;

Besenbacher, Flemming ;

Hornekaer, Liv .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2009, 131 (25) :8744-+

[4] Chemical Modification of Epitaxial Graphene: Spontaneous Grafting of Aryl Groups [J].

Bekyarova, Elena ;

Itkis, Mikhail E. ;

Ramesh, Palanisamy ;

Berger, Claire ;

Sprinkle, Michael ;

de Heer, Walt A. ;

Haddon, Robert C. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2009, 131 (04) :1336-+

[5] Electronic confinement and coherence in patterned epitaxial graphene [J].

Berger, Claire ;

Song, Zhimin ;

Li, Xuebin ;

Wu, Xiaosong ;

Brown, Nate ;

Naud, Cecile ;

Mayou, Didier ;

Li, Tianbo ;

Hass, Joanna ;

Marchenkov, Atexei N. ;

Conrad, Edward H. ;

First, Phillip N. ;

de Heer, Wait A. .

SCIENCE, 2006, 312 (5777) :1191-1196

[6] Scanning tunneling spectroscopy of inhomogeneous electronic structure in monolayer and bilayer graphene on SiC [J].

Brar, Victor W. ;

Zhang, Yuanbo ;

Yayon, Yossi ;

Ohta, Taisuke ;

McChesney, Jessica L. ;

Bostwick, Aaron ;

Rotenberg, Eli ;

Horn, Karsten ;

Crommie, Michael F. .

APPLIED PHYSICS LETTERS, 2007, 91 (12)

[7] Carbon-Based Field-Effect Transistors for Nanoelectronics [J].

Burghard, Marko ;

Klauk, Hagen ;

Kern, Klaus .

ADVANCED MATERIALS, 2009, 21 (25-26) :2586-2600

[8] Electron energetics at surfaces and interfaces: Concepts and experiments [J].

Cahen, D ;

Kahn, A .

ADVANCED MATERIALS, 2003, 15 (04) :271-277

[9] Surface transfer p-type doping of epitaxial graphene [J].

Chen, Wei ;

Chen, Shi ;

Qi, Dong Chen ;

Gao, Xing Yu ;

Wee, Andrew Thye Shen .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2007, 129 (34) :10418-10422

[10] Covalent Functionalization of Epitaxial Graphene by Azidotrimethylsilane [J].

Choi, Junghun ;

Kim, Ki-jeong ;

Kim, Bongsoo ;

Lee, Hangil ;

Kim, Sehun .

JOURNAL OF PHYSICAL CHEMISTRY C, 2009, 113 (22) :9433-9435

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