Ion beam modification of fullerene films and their frictional behavior

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Ion beam modification of fullerene films and their frictional behavior Rabi S. Bhattacharya and A. K. Rai UES, Inc., 4401 Dayton-Xenia Road, Dayton, Ohio 45432-1894

J. S. Zabinski Materials Directorate, Wright Laboratory, Wright Patterson Air Force Base, Dayton, Ohio 45433-6533

Neil T. McDevitt Ramspec Research, 4399 East Mohave Drive, Dayton, Ohio 45431 (Received 16 August 1993; accepted 21 March 1994)

C60 films were deposited on a variety of substrates by thermal evaporation. The presence of C6o in the films was confirmed by Transmission Electron Microscopy and Raman spectroscopic analysis. The C6o films exhibited an average friction coefficient of 0.4-0.5. The films were irradiated with 2 MeV Ag + and B + ions at various doses. High energy ion bombardment created damage that resulted in partly crystalline to amorphous films, dependent on the mass and dose of ions. The amorphous films showed a friction coefficient of

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