The interaction of C60 fullerene and carbon nanotube with Ar ion beam

The interactions of C-60 fullerene and carbon nanotube with Ar ion beam have been studied using XPS and AES in-situ techniques. The studies have shown that the shake-up peaks of C Is and the valence band peaks of XPS in a C-60 film disappear after it is irradiated with Ar ion beam. The conjugated ri bonds in a C-60 molecule are disrupted, and the ball structure of a C,, molecule is also destroyed by Ar ion beam. After a C-60 film is irradiated with Ar ion beam, the binding energy of C Is decreases about 0.3 eV and the kinetic energies of C KLL in XAES and in EAES increase about 1.9 and 1.5 eV, respectively. A. new kind of carbon species, which does not contain the conjugated pi bonds but keeps still sp(2) hybridization, is formed. The shake-up peak of C Is in carbon nanotube disappears also after it is bombarded with Ar ion beam. After carbon nanotube is irradiated with Ar ion beam, two characteristic peaks that are related to the dangling bonds in amorphous carbon appear in 9.6 and 22.6 eV. In contrast to the results of C-60, the binding energy of C Is increases 0.15 eV and the kinetic energy of C KLL in XAES decreases 1.6 eV after carbon nanotube is bombarded with Ar ion beam. The conjugated pi bonds and the tube structure of carbon nanotube are destroyed by Ar ion beam. The carbon nanotube is changed into an amorphous carbon rod. (C) 1999 Elsevier Science B.V. All rights reserved.