Cluster Expansion Homepage - This site gives an introduction to a program package that enables to calculate zero temperature cluster expansions for various quantum lattice models. A special emphasis lies on the handling of the large number of clusters which is a complex combinatorical problem in itself.
The Nanotube Site - A reference page for carbon nanotubes. Information and links to most web sites in the field.
NASA: Center for Nanotechnology - Focuses on experimental research and development in nano and bio technologies. In addition, the Center conducts research in computational electronics, computational optoelectronics, and computational modeling of processes encountered in nanofabrication and microelectronics manufacturing.