期刊
ACS NANO
卷 4, 期 7, 页码 4033-4038出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn100537z
关键词
disordered graphene; quantum transport; metal-insulator transition; ozone treatment; numerical simulation
类别
资金
- F.R.S.-FNRS of Belgium
- Communaute Francaise de Belgique
- European Union [215752]
- French National Agency (ANR) [ANR-09-NANO-016-01]
- Spanish MICINN [FIS2009-12721-C04-01]
- ICREA Funding Source: Custom
We present a multiscale ab initio study of electronic and transport properties of two-dimensional graphene after epoxide functionalization via ozone treatment. The orbital rehybridization induced by the epoxide groups triggers a strong intervalley scattering and changes dramatically the conduction properties of graphene. By varying the coverage density of epoxide defects from 0.1 to 4%, charge conduction can be tuned from a diffusive to a strongly localized regime, with localization lengths down to a few nanometers long. Experimental results supporting the interpretation as a metal-insulator transition are also provided.
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