Shear Forces in Molecularly Thin Films

Monte Carlo and molecular dynamics methods have been used to study the shearing behavior of an atomic fluid between two plane-parallel solid surfaces having the face-centered cubic (100) structure. A distorted, face-centered cubic solid can form epitaxially between surfaces that are separated by dis...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 1989-09, Vol.245 (4923), p.1223-1225
Main Authors: Schoen, Martin, Rhykerd, Charles L., Diestler, Dennis J., Cushman, John H.
Format: Article
Language:English
Subjects:
400201 - Chemical & Physicochemical Properties
Analysis
Atoms
Condensed matter: structure, mechanical and thermal properties
Critical loading
DATA
Dielectric films
Exact sciences and technology
EXPERIMENTAL DATA
FLUIDS
Hydraulics
INFORMATION
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
MECHANICAL PROPERTIES
Mica
Molecular dynamics
Molecules
MONTE CARLO METHOD
NUMERICAL DATA
Physics
Shear (Mechanics)
SHEAR PROPERTIES
Shear stress
Solid surfaces
SOLIDS
Structure of solids and liquids
crystallography
Studies of specific liquid structures
THIN FILMS
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Summary:Monte Carlo and molecular dynamics methods have been used to study the shearing behavior of an atomic fluid between two plane-parallel solid surfaces having the face-centered cubic (100) structure. A distorted, face-centered cubic solid can form epitaxially between surfaces that are separated by distances of one to five atomic diameters. Under these conditions a critical stress must be overcome to initiate sliding of the surfaces over one another at fixed separation, temperature, and chemical potential. As sliding begins, a layer of solid exits the space between the surfaces and the remaining layers become fluid.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.245.4923.1223