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Novel tribological system: superlubricity of xenon islands and slippery oil impregnated surfaces

Lunedý 19 febbraio 2018, ore 15.30, aula L.1.6, edificio Fisica, Dipartimento FIM, Modena

Relatore: Prof. Gianpaolo Mistura (Dip. di Fisica e Astronomia G. Galilei, UniversitÓ di Padova)

Abstract: We present two novel examples of tribological systems which, despite the huge difference in sizes involved, are characterized by very low friction. First, we discuss the results of a recent quartz crystal microbalance (QCM) study of the sliding friction of nanometric Xe islands on Cu(111). QCM data show remarkably large slip times at increasing submonolayer coverages, signaling superlubricity, followed by a dramatic drop to zero for the dense commensurate monolayer. Then, we move to the macroscopic scale, to summarize the interesting features exhibited by liquid impregnated surfaces concerning the manipulation of liquid drops.

[1] M. Pierno, L. Bruschi, G. Mistura, G. Paolicelli, A. di Bona, S. Valeri, R. Guerra, A. Vanossi and E. Tosatti, Frictional transition from superlubric islands to pinned monolayers, Nature Nanotechnology 10, 714-718 (2015).
[2] See e.g., G. Mistura, M. Pierno, "Drop mobility on chemically heterogeneous and lubricant impregnated surfaces", Advances in Physics X, 2, 591-607 (2017), and references therein.

Ospiti: Alberto Rota.

[Ultimo aggiornamento: 14/02/2018 11:17:13]