679240.fig.001a
(a)
679240.fig.001b
(b)
679240.fig.001c
(c)
Figure 1: (a) Formation of a SWCNT-graphene junction. “S” denotes septagon and “DH” denotes distorted hexagon. (b) A hexagonal carbon ring in (6,6) SWCNT. (c) A hexagon/septagon carbon ring in a SWCNT-graphene junction.