4 石墨烯用作锂离子电池负极材料的电化学性能研究(11)

The Effect of Structure on the Electronic Structure of Graphenez

Number of layersMonolayer Bilayer Triple-layer Bulk graphite

The electronic structure rapidly evolves with the number of layers:z

Monolayer and bilayer graphene: zero-gap semiconductors; with one type of electron and one type of hole For three or more layers: several charge carriers; the conduction and valence bands overlapping More than 10 layers: approaching the 3D limit of graphiteAK Geim et al., Nature Mater. 6 (2007) 183 T Ohta et al., Science 313 (2005) 951 B Partoens et al., Phys. Rev. B 74 (2006) 075404

z

z

2012-8-20

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