Stick to slip transition and adhesion of lubricated surfaces in moving contact

Günter Reiter, A. Levent Demirel, John Peanasky, Lenore Dai, Steve Granick

Research output: Contribution to journalArticle

117 Citations (Scopus)

Abstract

The friction of dry self-assembled monolayers, chemically attached to a solid surface and comprising a well-defined interface for sliding, is compared to the case of two solids separated by an ultrathin confined liquid. The monolayers were condensed octadecyltriethoxysilane (OTE). The liquid was squalane (C30H62), a film 2.0 nm thick confined between parallel plates of mica. The method of measurement was a surface forces apparatus, modified for oscillatory shear. The principal observations were the same in both cases: (1) Predominantly elastic behavior in the linear response state was followed by a discontinuous transition to a mostly dissipative state at larger deformations. The elastic energy stored at the transition was low, of the order of 0.1 kT per molecule. This transition was exactly repeatable in repetitive cycles of oscillation and reversible with pronounced hysteresis. (2) The dissipative stress in the sliding state was almost independent of peak sliding velocity when this was changed over several decades. Significant (although smaller) elastic stress also persisted, which decreased with increasing deflection amplitude but was almost independent of oscillation frequency. (3) The adhesive energy in the sliding state was significantly reduced from that measured at rest. This similarity of friction in the two systems, dry and wet sliding, leads us to speculate that, similar to plastic deformation of solids, sliding in the confined liquid films is the result of slippage along an interface.

Original languageEnglish (US)
Pages (from-to)2606-2615
Number of pages10
JournalThe Journal of Chemical Physics
Volume101
Issue number3
StatePublished - 1994
Externally publishedYes

Fingerprint

sliding
electric contacts
adhesion
slip
Adhesion
Friction
Liquid films
Liquids
Self assembled monolayers
Hysteresis
Monolayers
Plastic deformation
Adhesives
friction
liquids
oscillations
Molecules
mica
parallel plates
solid surfaces

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Reiter, G., Demirel, A. L., Peanasky, J., Dai, L., & Granick, S. (1994). Stick to slip transition and adhesion of lubricated surfaces in moving contact. The Journal of Chemical Physics, 101(3), 2606-2615.

Stick to slip transition and adhesion of lubricated surfaces in moving contact. / Reiter, Günter; Demirel, A. Levent; Peanasky, John; Dai, Lenore; Granick, Steve.

In: The Journal of Chemical Physics, Vol. 101, No. 3, 1994, p. 2606-2615.

Research output: Contribution to journalArticle

Reiter, G, Demirel, AL, Peanasky, J, Dai, L & Granick, S 1994, 'Stick to slip transition and adhesion of lubricated surfaces in moving contact', The Journal of Chemical Physics, vol. 101, no. 3, pp. 2606-2615.
Reiter, Günter ; Demirel, A. Levent ; Peanasky, John ; Dai, Lenore ; Granick, Steve. / Stick to slip transition and adhesion of lubricated surfaces in moving contact. In: The Journal of Chemical Physics. 1994 ; Vol. 101, No. 3. pp. 2606-2615.
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