Publication: Origins of solidification when a simple molecular fluid is confined between two plates
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Program
KU-Authors
KU Authors
Co-Authors
Granick, S.
Advisor
Publication Date
2001
Language
English
Type
Journal Article
Journal Title
Journal ISSN
Volume Title
Abstract
A simple globular-shaped liquid (octamethylcyclotetrasiloxane, OMCTS) was placed between two rigid mica plates at variable spacings comparable to the size of this molecule and the linear shear viscoelasticity of the confined interfacial film was measured. Strong monotonic increase of the shear relaxation time, elastic modulus, and effective viscosity were observed as the spacing was decreased below about 10 molecular dimensions. The frequency dependence of the viscoelastic spectra measured at different film thicknesses appeared to scale with reduced variables. The data are inconsistent with the abrupt first-order transition, from bulk fluid to solid with decreasing film thickness, whose possibility has been hypothesized, and suggest a glasslike transition instead.
Description
Source:
Journal of Chemical Physics
Publisher:
American Institute of Physics (AIP) Publishing
Keywords:
Subject
Chemistry