Journal ArticleDOI
Confinement-induced phase transitions in simple liquids.
Jacob Klein,Eugenia Kumacheva +1 more
TLDR
The liquid-to-solid transition of a simple model liquid confined between two surfaces was studied as a function of surface separation and the rigidity of the confined films increased reversibly by at least seven orders of magnitude.Abstract:
The liquid-to-solid transition of a simple model liquid confined between two surfaces was studied as a function of surface separation. From large surface separations (more than 1000 angstroms) down to a separation corresponding to seven molecular layers, the confined films displayed a liquid-like shear viscosity. When the surface separation was further decreased by a single molecular spacing, the films underwent an abrupt, reversible transition to a solid. At the transition, the rigidity of the confined films (quantified in terms of an "effective viscosity") increased reversibly by at least seven orders of magnitude.read more
Citations
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Hydration Lubrication in Biomedical Applications: From Cartilage to Hydrogels
Weifeng Lin,Jacob Klein +1 more
TL;DR: This Account introduces the concept and origin of hydration lubrication, extending from the seminal study of lubrication by hydrated simple ions to more complex systems, and considers modes of hydrogel lubrication and different kinds of such low-friction synthetic gels and then focuses on cartilage-inspired, boundary-lubricated hydrogels.
Journal ArticleDOI
Experimental and simulation study of the high-pressure behavior of squalane and poly-α-olefins
Iain J. Prentice,Xiaojiao Liu,Oleg Nerushev,Sashi Balakrishnan,Colin R. Pulham,Philip J. Camp +5 more
TL;DR: Results show that molecular diffusion is essentially arrested above about 1 GPa, which supports the hypothesis that the samples are kinetically trapped in metastable amorphous-solid states, and the ability of lubricating thin films to act as load-bearing media can be linked to the solidification phenomena studied in this work.
Journal ArticleDOI
Sublimation phenomena of Lennard-Jones fluids in slit nanopores
Hideki Kanda,Minoru T. Miyahara +1 more
TL;DR: Using molecular dynamics simulations, the thermodynamic model successfully predicts the simulation results without the need to introduce any adjustable parameter, and thus proves its reliability.
Journal ArticleDOI
Solvation force simulations in atomic force microscopy.
Rong-Guang Xu,Yongsheng Leng +1 more
TL;DR: It has been found that OMCTS fluid in tip-substrate contact has a strong tendency to form a layered structure, starting from n = 8 layers, and the force profile obtained from simulation is qualitatively similar to those in contact mode AFM experiments.
Journal ArticleDOI
Solidification and Superlubricity With Molecular Alkane Films
TL;DR: It is found that commensurate surface alignment and presence of water at the interfaces each lead to moderate or high friction, whereas friction coefficients down to μ≈0.001 are observed for a single molecular layer of dodecane trapped between crystallographically misaligned dry surfaces.
References
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Journal ArticleDOI
Surface energy and the contact of elastic solids
TL;DR: In this paper, the influence of surface energy on the contact between elastic solids is discussed and an analytical model for its effect upon the contact size and the force of adhesion between two lightly loaded spherical solid surfaces is presented.
Book
The friction and lubrication of solids
Frank Philip Bowden,David Tabor +1 more
TL;DR: Tabor and Bowden as mentioned in this paper reviewed the many advances made in this field during the past 36 years and outlined the achievements of Frank Philip Bowden, and reviewed the behavior of non-metals, especially elastomers; elastohydrodynamic lubrication; and the wear of sliding surfaces.
Journal ArticleDOI
Slow viscous motion of a sphere parallel to a plane wall—I Motion through a quiescent fluid
TL;DR: Asymptotic solutions of the Stokes equations are derived for both the translational and rotational motions of a sphere parallel to a plane wall bounding a semi-infinite, quiescent, viscous fluid in the limit where the gap width tends to zero as discussed by the authors.
Journal ArticleDOI
Physics of the Granular State
TL;DR: The generation of analogies between the physics found in a simple sandpile and that found in complicated microscopic systems, such as flux motion in superconductors or spin glasses, has prompted a number of new theories and to a new era of experimentation on granular systems.