Fig. 2 (IMAGE)

Institute for Basic Science

Fig. 2

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The model for carbon nanotube (CNT) growth in the (a) presence and (b) absence of sufficient etching agents. In (a) most dissociated carbon atoms are taken away from the catalyst surface by etching agents and the CNT growth will depend on the number of active sites (red triangles) or the structure of the CNT. In (b), in the absence of etching agent, every decomposed carbon atom has to be a part of the CNT, and therefore, the number of active sites or the structure of the CNT has no impact on the growth rate, but will affect the duration of CNT's grow.

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