The frictional properties of alkyl-substituted phthalocyanines physisorbed on the graphite substrate are investigated by atomic force microscopy in liquid condition. the frictional process of alkyl-substituted phthalocyanines physisorbed on the graphite substrate consists of two regions of “shear” and “wear”. In the “shear” process, friction force varies approximately as power law with exponent of 0.6–0.7 (Region I). On the other hand, friction force is maintained substantially constant in the “wear” process (Region II). The experimental data are qualitatively explained by the simplified model, which assumes that the alkyl-substrate and alkyl-alkyl interactions are approximated by Lennard-Jones interactions.
Frictional Properties of Alkyl-Substituted Phthalocyanines Physisorbed on Graphite
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Miyake, K, Hori, Y, Ikeda, T, Asakawa, M, Shimizu, T, & Sasaki, S. "Frictional Properties of Alkyl-Substituted Phthalocyanines Physisorbed on Graphite." Proceedings of the World Tribology Congress III. World Tribology Congress III, Volume 2. Washington, D.C., USA. September 12–16, 2005. pp. 771-772. ASME. https://doi.org/10.1115/WTC2005-63625
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