Figure 1.

SEM images of as-grown CNTs at three different temperatures with and without S. (a-c). Different temperatures with S: (a) 940°C, (b) 980°C, (c) 1020°C; (d-f) different temperatures without S: (d) 940°C, (e) 980°C, (f) 1020°C.

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