Carbon Nanotubes I
Metal Catalyst Synthesis
Three-dimensional plot showing the mean diameter dependence on oven temperature and Ni/Co ratio. (b) Twodimensional plot of mean diameter vs oven temperature for pure Ni (lower sigmoid curve), pure Co (linear curve), and Ni/Co (1:1) (upper sigmoid curve). (c) Three-dimensional plot of relative yield against oven temperature and Ni/Co ratio. (d) Twodimensional plot of relative yield. From bottom up: pure Co, pure Ni, Ni/Co (1:1). (e) Four-dimensional plot of G/D ratio dependence on catalyst Ni/Co ratio and oven temperature. The shading corresponds to yield. (f) Two-dimensional plot illustrating the G/D change with temperature and catalyst ratio. From bottom up: pure Co, pure Ni, Ni/Co (1:1). Curves are a guide to the eye.
(a, c) TEM micrographs of (oxidized) Fe nanoparticles with median diameters of 5 and 10 nm, respectively. (b, d) Corresponding TEM micrographs of CNT grown from these particles. The particle size or CNT diameter distributions are shown as insets.
Vertically aligned forests of CNTs
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