Effect of fullerene C60 thermal and tribomechanical loading on Raman signals

Fullerene C60 powder was loaded by 1 N normal force and exposed to sliding under different frequencies for 15 min. It is shown that the velocity of movement determines stability fullerene powder. At slow with a frequency Hz force, structure remains undamaged after min sliding. On contrary, high velocities 10 50 affected fragmentation C60, which resulted in reduction coefficient friction (COF). During Hz, reached highest level an average COF 0.59 ± 0.03. The faster relative motion gave lower 0.39 initial formed thick compressed layer tribomechanical zone. As proven Raman spectroscopy, operating test at stimulated re-attraction fresh island onto fragmented from outside regions. increasing again up 0.44 0.04 frequency. decomposition attributed thermal heating during fast movement. spectra are compared slowly heated air laser irradiated C60.