DOI: 10.1063/1.442146. Direct measurement of structural forces between two surfaces in a nonpolar liquid

Direct measurement of structural forces between two surfaces in a nonpolar liquid

10.1063/1.442146

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

The force as a function of separation has been measured between two molecularly smooth surfaces immersed in the liquid octamethylcyclotetrasiloxane (OMCTS) whose molecules are quasispherical of diameter ∼1.0 nm. The force is an oscillatory function of distance, varying between attraction and repulsion, with a periodicity equal to the size of the liquid molecules to within the experimental resolution of ∼0.1 nm. The oscillations decay rapidly with distance: their measurable range is 6–10 molecular diameters and their magnitude exceeds that of conventional van der Waals forces at small distances. The magnitude of the oscillations is insensitive to changes in temperature, but sensitive to the chemical nature of the surfaces, and very sensitive to the presence of water. The results are considered, qualitatively, within the context of current theories of the liquid state near solid interfaces, and some implications for surface chemistry and colloid science are discussed.

Bibliography

Horn, R. G., & Israelachvili, J. N. (1981). Direct measurement of structural forces between two surfaces in a nonpolar liquid. The Journal of Chemical Physics, 75(3), 1400â1411.

Authors 2

Roger G. Horn (first)
Jacob N. Israelachvili (additional)

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Dates

Type	When
Created	22 years, 5 months ago (Feb. 28, 2003, 11:03 a.m.)
Deposited	1 year, 6 months ago (Feb. 9, 2024, 5:47 p.m.)
Indexed	23 hours, 5 minutes ago (Aug. 23, 2025, 9:56 p.m.)
Issued	44 years ago (Aug. 1, 1981)
Published	44 years ago (Aug. 1, 1981)
Published Print	44 years ago (Aug. 1, 1981)

Funders 0

None

BibTeX

@article{Horn_1981, title={Direct measurement of structural forces between two surfaces in a nonpolar liquid}, volume={75}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.442146}, DOI={10.1063/1.442146}, number={3}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Horn, Roger G. and Israelachvili, Jacob N.}, year={1981}, month=aug, pages={1400–1411} }

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