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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Preparation and Characterization of Graphene Oxide Paper
Dmitriy A. Dikin,Sasha Stankovich,Eric Zimney,Richard D. Piner,Geoffrey Dommett,Guennadi Evmenenko,SonBinh T. Nguyen,Rodney S. Ruoff +7 more
TL;DR: Graphene oxide paper is reported, a free-standing carbon-based membrane material made by flow-directed assembly of individual graphene oxide sheets that outperforms many other paper-like materials in stiffness and strength.
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Phase separation in confined systems
TL;DR: A review of the current state of knowledge of phase separation and phase equilibria in porous materials can be found in this article, where the focus is on fundamental studies of simple fluids and well-characterized materials.
Journal ArticleDOI
Scratching the Surface: Fundamental Investigations of Tribology with Atomic Force Microscopy.
TL;DR: The goal of this paper is to demonstrate that AFM is capable of producing atomic-scale knowledge, and to focus upon some of the contributions of the AFM to nanotribology.
Journal ArticleDOI
Boundary slip in Newtonian liquids: a review of experimental studies
TL;DR: A review of experimental studies regarding the phenomenon of slip of Newtonian liquids at solid interfaces is provided in this article, with particular attention to the effects that factors such as surface roughness, wettability and the presence of gaseous layers might have on the measured interfacial slip.
Journal ArticleDOI
Nanofluidics: what is it and what can we expect from it?
TL;DR: In this paper, the present state of research in this field and possible directions of development are discussed, focusing on the very diverse background of nanofluidics in biology, chemistry, physics and engineering and valuable knowledge available in these disciplines.
References
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Journal ArticleDOI
Liquid to solidlike transitions of molecularly thin films under shear
TL;DR: In this article, the authors measured the shear forces between two molecularly smooth solid surfaces separated by thin films of various organic liquids and investigated the transition from continuum to molecular behavior in very thin films.
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Dynamic Properties of Molecularly Thin Liquid Films
TL;DR: Results show that two molecularly smooth surfaces, when close together in simple liquids, slide (shear) past each other while separated by a discrete number of molecular layers, and that the frictional force is "quantized" with the number of layers.
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Reduction of frictional forces between solid surfaces bearing polymer brushes
TL;DR: In this paper, the authors measured the lateral forces between sliding brush-bearing surfaces and found a striking reduction in the effective friction coefficients between the surfaces to below their detection limit (μb < 0.001), for contact pressures of around 1 MPa and sliding velocities from zero to 450 nm s−1.
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Origin of stick-slip motion in boundary lubrication.
TL;DR: Simulation results indicate that the origin of stick-slip motion is thermodynamic instability of the sliding state, rather than a dynamic instability as usually assumed.
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Surface forces and viscosity of water measured between silica sheets
TL;DR: In this article, two silica sheets were immersed in aqueous solutions of NaCl to study both the surface forces between them and the viscosity of the intervening NaCl film.