Page 99 - Carbon Nanotubes

Graphitizable coiled carbon nanotubes 89

Fig. 4. (a) and (b) Model structures of the (9,O)-(5,5) knee, (c) model structure of the (5,5) tubule inside
of the (10,lO) tubule, (d) model structure of the (18,0)-(10$0) knee and the (9,O)-(5,5) knee with a
graphite interplanar distance (3.46 A) between them.

layers. Hence, this series can be described as realizing for the (L,O)-(L',L') connections while we observed
the best epitaxy both in the 5-7 knee region and 36" from our ball and stick molecular models con-
away from it in the straight sections. structed with rigid sp2 triangular bonds (Fig. 5). In
Dunlap's plane construction gives an angle of 30" fact, 30" is the angle formed by the "pressed" tubule