Liquid nanofilms. A mechanical model for the disjoining pressure

Liquids in contact with solids are submitted to intermolecular forces making liquids heterogeneous and, in a mechanical model, the stress tensor is not any more spherical as in homogeneous bulks. The aim of this article is to show that a square-gradient functional taking into account the volume liqu...

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Bibliographic Details
Published in:International journal of engineering science 2009-05, Vol.47 (5), p.691-699
Main Author: Gouin, Henri
Format: Article
Language:English
Subjects:
Chemical Physics
Classical and quantum physics: mechanics and fields
Condensed Matter
Condensed matter: structure, mechanical and thermal properties
Disjoining pressure
Engineering Sciences
Exact sciences and technology
Fluid mechanics
Functional analytical methods
Mechanical and acoustical properties
Mechanical properties of thin films
Mechanics
Micro and nanotechnologies
Microelectronics
Nanofilms
Physical properties of thin films, nonelectronic
Physics
Quantum mechanics
Soft Condensed Matter
Surfaces and interfaces
thin films and whiskers (structure and nonelectronic properties)
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Summary:Liquids in contact with solids are submitted to intermolecular forces making liquids heterogeneous and, in a mechanical model, the stress tensor is not any more spherical as in homogeneous bulks. The aim of this article is to show that a square-gradient functional taking into account the volume liquid free energy corrected with two surface liquid density functionals is a mean field approximation allowing to study structures of very thin liquid nanofilms near plane solid walls. The model determines analytically the concept of disjoining pressure for liquid films of thicknesses of a very few number of nanometers and yields a behavior in good agreement with the shapes of experimental curves carried out by Derjaguin and his successors.
ISSN:0020-7225
1879-2197
DOI:10.1016/j.ijengsci.2009.01.006