Figure 4From: Carbon nanotubes on nanoporous alumina: from surface mats to conformal pore fillingSEM and TEM images of carbon nanotubes grown in 750°C process, Fe only series (C 2 H 4 , no S1813; Table 1). (a, b) Side view, nanotubes are present on the membrane top only, the channels are empty; (c, d) top view; and (e, f) the multi-walled nanotubes contain approximately 25 to 30 walls.Back to article page