John T. Yates, Jr.
Department of Chemistry, Surface Science Center, University of Pittsburgh
Tailor-making nanotubes to have specific adsorption properties could be of extreme importance in fields such as environmental cleanup, sensor technology and nanoelectronics.We have investigated the behavior of both natural and modified single walled carbon nanotubes where the closed ends and walls of these tubes are opened by oxidative treatments. The physical adsorption of CF4 and Xe in the interior and on the outer walls of the nanotubes has been studied by both kinetic and infrared spectroscopic techniques. Adsorbed CF4 species exhibit characteristic infrared spectra in the interior and the exterior of the nanotubes, and methods have been found to preferentially deplete the internally-bound CF4 by displacement. These measurements probe the effect of confinement of moleculesin pseudo one-dimensional space.