AFM and STM investigation of carbon nanotubes produced by high energy ion irradiation of graphite

摘要

Carbon nanotubes (CNT) were produced by high enengy, heavy ion irradiation (215 MeV Ne, 246 MeV Kr, 156 MeV Xe) of graphite. On samples irradiated with Kr and Xe ions large craters were found by atomic force microscopy, these are attributed to sputtering. Frequently one or several CNTs emerge from the craters. Some of the observed CNTs showed a reqular vibration pattern. No other carbon based materials, like amorphous carbon or fullerenes were evidenced. Focused ion beam cuts were used to compare CNTs with surface folds on graphite. direct c 1999 Elsevier Science B.V. All rights reserved.