Fig. 2a. (i) One of the first photographs of isolated graphene. They used
the simple technique of ripping layers from a graphite surface (called as
exfoliation) using adhesive tape. Courtesy of http://physicsweb.org. (ii) High
resolution scanning electron micrograph image of graphene. Reproduced
with permission from Physics World, Nov 2006, p 1. (iii) Atomic resolution
of graphitic layers extracted using exfoliation method. Reproduced with
permission from Nature Mater., 6, 185 (2007).
