Figure 1.

Transmission electron micrographs of SWNT bundles (left panel) and an individual SWNT (right panel) synthesized from cobalt by Bethune et al. Reprinted with permission from Bethune et al. [5].

Rümmeli et al. Nanoscale Research Letters 2011 6:303   doi:10.1186/1556-276X-6-303
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