Journal
NANO RESEARCH
Volume 4, Issue 1, Pages 143-152Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-010-0084-7
Keywords
Graphene; fluorinated graphene; fluorographene; nanoroads; quantum dots
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Funding
- Office of Naval Research
- Roberto Rocca Educational Program
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Using ab initio methods we have investigated the fluorination of graphene and find that different stoichiometric phases can be formed without a nucleation barrier, with the complete 2D-Teflon CF phase being thermodynamically most stable. The fluorinated graphene is an insulator and turns out to be a perfect matrix-host for patterning nanoroads and quantum dots of pristine graphene. The electronic and magnetic properties of the nanoroads can be tuned by varying the edge orientation and width. The energy gaps between the highest occupied and lowest unoccupied molecular orbitals (HOMO-LUMO) of quantum dots are size-dependent and show a confinement typical of Dirac fermions. Furthermore, we study the effect of different basic coverage of F on graphene (with stoichiometries CF and C4F) on the band gaps, and show the suitability of these materials to host quantum dots of graphene with unique electronic properties.
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