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Title: Modulating the electronic structures of graphene by controllable hydrogenation
Authors: Luo, Z.
Shang, J.
Lim, S.
Li, D.
Xiong, Q.
Shen, Z.
Lin, J.
Yu, T. 
Issue Date: 6-Dec-2010
Citation: Luo, Z., Shang, J., Lim, S., Li, D., Xiong, Q., Shen, Z., Lin, J., Yu, T. (2010-12-06). Modulating the electronic structures of graphene by controllable hydrogenation. Applied Physics Letters 97 (23) : -. ScholarBank@NUS Repository.
Abstract: The evolution of electronic structures of hydrogenated graphene with different amount of hydrogen (H) coverage was investigated by ultraviolet photoemission spectroscopy and optical absorption spectroscopy. Raman spectroscopy and x-ray photoelectron spectroscopy were used to monitor and evaluate the H coverage. At low H coverage, the s p3 C - H bonds embedded within a s p2 C matrix behave as defects in graphene and depress the delocalized π electron system. At high H coverage, two localized π electron states originating from the s p2 C clusters encircled by the s p3 C - H matrix appear in the electronic band structures, and an opening of a band gap has been observed. © 2010 American Institute of Physics.
Source Title: Applied Physics Letters
ISSN: 00036951
DOI: 10.1063/1.3524217
Appears in Collections:Staff Publications

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