Abstract Submitted to the NANOTUBE'02 Workshop:

Electronic structures of carbon nanotubes can be seriously modified with gas adsorption. For instance, adsorption of oxygen gas on carbon nanotubes changes the carrier to be an acceptor-type. Adsorption of different types of gases can be distinguished easily by such type changes with very high sensitivity, making it possble to apply for gas nanosensors. Functionalization of nanotube walls by atomic hydrogen and fluor is also very useful for energy storage, transistor, and further functionalization for chemical and biological sensors. Both the electronic and atomic structures are seriously modified. We will show some fundamentals and applications of these functionalizations of our recent works.