Figure 2.

TEM images of as-grown CNTs at three different temperatures with and without S. (a) 980°C without S; (b-d) different temperatures with S: (b) 940°C, (c) 980°C, (d) 1020°C; (e-h) novel CNT structures with S: (e) bamboo-like CNTs, (f) twisted CNTs, (g) arborization-like CNTs, (h) bead-like CNTs.

Cui et al. Nanoscale Research Letters 2011 6:77   doi:10.1186/1556-276X-6-77
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