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).

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).