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Fig. 7 Schematic diagram showing the possible wrapping of the 2D graphene sheet into tubular
forms: (a) (3,4) chiral tube; (b) (3,3) armchair tube; (c) (5,0) zig zag tube
Fig. 8 Metals, band insulators and graphene electron densities at the Fermi level
Fig. 9 Representation of the electronic energy states of graphene, showing the 3D view of the
ˀ
/
ˀ
* bands. The
insert
shows the energy dispersion along the high-symmetry lines between the
ʓ
,
M, and K points. Reprinted with kind permission of Springer Science + Business Media from [
29
]
