Figure 5
From: Carbon nanotubes on nanoporous alumina: from surface mats to conformal pore filling
SEM images. (a, b) SEM images of the carbon nanotubes grown in the 750°C process, Fe + S1813 series (C2H4 + S1813 + Fe, see Table 1). Nanotubes protruding from the membrane channels are clearly visible in (b). (c, d) SEM images of the carbon nanotubes grown in the 750°C process, Fe + S1813 + Plasma series (C2H4 + S1813 + plasma). (e, f) Nanotubes grown in the ‘900°C’ process, Fe + S1813 + Plasma series (CH4 + S1813 + plasma).