6Novoselov K S, Geim A K, Morozov S V, et al. Electric Field Effect in Atomically Thin Carbon Films[J]. Science, 2004, 306 : 666-669.
7Geim A K, Novoselov K S. The rise of graphene [ J]. Nature Materials, 2007, 6: 183-191.
8Kyotani T, Sonobe N, Tomita A. Formation of highly orientated graphite from polyacrylonitrile by using a two-dimensional space between monmorillonite lamellae [J]. Nature, 1988, 331: 331- 333.
9Novoselov K S, Jiang D, Schedin F. Two-dimensional atomic crystals [J]. PNAS,2005,102: 10451-10453.
10Meyer J C, Geim A K, Katsnelson M I, et al. The structure of suspended graphene sheets [ J]. Nature, 2007, 446: 60-63.
