Cover Picture: Architectures from Aligned Nanotubes Using Controlled Micropatterning of Silicon Substrates and Electrochemical Methods (Small 7/2007)

The cover picture shows scanning electron microscopy images of N-doped carbon-nanotube microarrays grown on electrochemically etched porous silicon substrates via a chemical vapor deposition process. Cactus- (top left), volcano- (top right), flower- (bottom left), and cake-shaped (bottom right) microarrays were obtained depending on the electrochemical etching conditions used on the substrates. For more information, please read the Communication “Architectures from Aligned Nanotubes Using Controlled Micropatterning of Silicon Substrates and Electrochemical Methods” by M. Terrones and co-workers, beginning on page 1157.