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Title: Unzipped graphene nanoribbons as sensitive O-2 sensors: Electron spin resonance probing and dissociation kinetics
Authors: Rao, S. S ×
Stesmans, Andre
Keunen, Koen
Kosynkin, D. V
Higginbotham, A
Tour, J. M #
Issue Date: Feb-2011
Publisher: American Institute of Physics
Series Title: Applied Physics Letters vol:98 issue:8 pages:-
Article number: 083116
Abstract: Electron spin resonance study of unzipped graphene nanoribbons (GNRs) reveals a specific carbon-related signal, denoted G(C), at g=2.0032, attributed to GNRs periphery centers. The signal is observed to be readily quenched upon O-2 adsorption, which appears to be fully reversible upon room temperature vacuum treatment. Its depassivation behavior, observed from 130 K onward, is well described by first-order kinetics, characterized by the dissociation energy of 0.58 +/- 0.04 eV of spread 0.11 +/- 0.02 eV. The G(C) signal is not sensitive to other gases, such as H-2, He, N-2, and Ar, pointing to a G(C)-O-2 physisorption interaction unique for GNRs, in agreement with theoretical insight. The G(C) center thus emerges as a highly selective, sensitive, and reversible O-2 sensor. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3559229]
ISSN: 0003-6951
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Semiconductor Physics Section
× corresponding author
# (joint) last author

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