Figure 1From: Carbon nanotubes on nanoporous alumina: from surface mats to conformal pore fillingSchematic of the process. After anodization in oxalic acid (a), the samples are subject to plasma pretreatment (b) or directly supplied to the thermal furnace for carbon nanotube growth (c). SEM image (d) shows the carbon nanotubes partially embedded in the nanoporous alumina membrane.Back to article page