Department of Applied Mathematics, Research School of Physical Sciences and Engineering, Australian National University, Canberra ACT Australia, 0200.
J. Phys. Chem. 96, 5086-5093 (1992).
Abstract
Measurements are reported for the oscillatory force between
mica surfaces in octamethyltetracyclosiloxane (OMCTS).
Improved experimental resolution is achieved by solid-state
distance control and force measurement,
and by an automated data acquisition system.
The period of the oscillations is measured to be $0.82\pm .02$nm.
Theoretical calculations are shown to quantitatively describe
the magnitude of the force in the case of hard-sphere and
of Lennard-Jones models of the OMCTS molecule,
with the period being 0.74nm and 0.78nm respectively.
A rigorous proof of the Derjaguin approximation is also given.
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