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
收藏
页码：505 / 509
页数：5
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