Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2010-05-01
Phys. Rev. B 81, 205435 (2010)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
7 pages, 5 figures, revtex, to appear in PRB
Scientific paper
We report the synthesis and evidence of graphene fluoride, a two-dimensional wide bandgap semiconductor derived from graphene. Graphene fluoride exhibits hexagonal crystalline order and strongly insulating behavior with resistance exceeding 10 G$\Omega$ at room temperature. Electron transport in graphene fluoride is well described by variable-range hopping in two dimensions due to the presence of localized states in the band gap. Graphene obtained through the reduction of graphene fluoride is highly conductive, exhibiting a resistivity of less than 100 k$\Omega$ at room temperature. Our approach provides a new path to reversibly engineer the band structure and conductivity of graphene for electronic and optical applications.
Cheng S.-H.
Eklund Peter C.
Gupta Anupam
Gutierrez Humberto R.
Okino Fujio
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