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TEM micrograph of cobalt nanoparticles: (a) spherical and (b) disk shape.
Raman spectra of carbon SWNTs (laser excitations 532 and ) grown with: (a) cobalt spherical particles, (b) cobalt disk shape particles, and (c) nanoparticles obtained by decomposition of cobalt nitrate. Ratio of corresponding -band and -band intensities is shown in the insets.
TEM images of cobalt disk shape catalyst particles after carbon SWNTs growth: (a) relatively large particles with still disk shape and (b) particles transformed into spheres.
DSC curves for: (a) disk-shaped cobalt nanoparticles supported on with molar ratio and (b) support powder. In both cases the background has been subtracted.
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