Chemical Doping of Epitaxial Graphene by Organic Free Radicals

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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.
Publisher
AMER CHEMICAL SOC
Issue Date
2010-01
Language
English
Article Type
Article
Keywords

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

Citation

JOURNAL OF PHYSICAL CHEMISTRY LETTERS, v.1, no.2, pp.505 - 509

ISSN
1948-7185
DOI
10.1021/jz900351w
URI
http://hdl.handle.net/10203/97736
Appears in Collection
CH-Journal Papers(저널논문)
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