have been fabricated by a feasible and inexpensive direct photolithography technique using ordinary black-and-white film as a photomask. Using a calcination/reduction protocol, transition metal salts in the photoresist are transformed to metallic dots, which act as catalysts for the growth of aligned carbon nanotubes by acetylene pyrolysis. (S. Huang et al., August 16, Adv. Mater. 2002, 14, 1140-1143)