This program was originally sponsored by the national science foundation and investigated the electronic structure of impurity doped single walled carbon nanotubes and boron nitride nanotubes.  Building on the success of earlier work in multiwalled systems, these doped materials are ideal for "tuning" charge transfer properties in conjugated matrix materials (above).  Scanning probe techniques are coupled with HRTEM, SEM, and Raman spectroscopy to generate a more complete understanding of how impurities couple to lattice distortions, electronics donor and acceptor states, and thermal properties of the tubes.  Recently, working jointly with the MPI-Stuttgart, we have begun to explore the transport properties of these novel materials.  This program has produced over 30 publications.