(a) 7.5 x 105 cm-2, (b) 2 x 106 cm-2, (c) 6 x 106 cm-2
(d) 2 x 107 cm-2, (e) 3 x 108 cm-2, and
(f) a single standing carbon nanotube
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Varied site densities of carbon nanotube arrays: (a) 7.5 x 105 cm-2, (b) 2 x 106 cm-2, (c) 6 x 106 cm-2 (d) 2 x 107 cm-2, (e) 3 x 108 cm-2, and (f) a single standing carbon nanotube |