DOI: 10.1063/1.452580. Solvation forces and phase separation of water in a thin film of nonpolar liquid between mica surfaces

Solvation forces and phase separation of water in a thin film of nonpolar liquid between mica surfaces

10.1063/1.452580

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

We present direct measurements of the force between two mica surfaces across a thin film of nonpolar liquid (octamethylcyclotetrasiloxane) containing water at activities in the range 0–0.75. The oscillatory solvation force at zero water content has been measured down to molecular contact for the first time. As the water activity is increased there is a reduction in the amplitude of the solvation force at larger separations, but progressively more of the inner oscillations become experimentally inaccessible as the interaction in this regime is replaced by a strong attraction. The adhesion at contact increases dramatically with water activity. We suggest that the results may be explained in terms of two related but separable effects. With increasing activity the increase in surface excess of water disrupts the layering of the molecules of the liquid between the surfaces which smears out the solvation force at long range. Phase separation of water occurs at progressively larger separations, at least for activities of 0.5 and above, and this gives rise to the sudden attraction that replaces the solvation force. The very large adhesion reflects the presence of condensed water around the surfaces at contact.

Bibliography

Christenson, H. K., & Blom, C. E. (1987). Solvation forces and phase separation of water in a thin film of nonpolar liquid between mica surfaces. The Journal of Chemical Physics, 86(1), 419â424.

Authors 2

Hugo K. Christenson (first)
Christina E. Blom (additional)

References 21 Referenced 74

10.1063/1.442146 / J. Chem. Phys. (1981)
10.1016/0009-2614(79)87116-X / Chem. Phys. Lett. (1979)
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10.1080/00018736100101281 / Adv. Phys. (1961)
10.1007/BF01433225 / Kolloid Z. (1934)
10.1063/1.444639 / J. Chem. Phys. (1983)
10.1016/0021-9797(86)90376-0 / J. Colloid Interface Sci. (1986)
{'key': '2024021004080775000_r8'}
10.1021/j100273a002 / J. Phys. Chem. (1986)
10.1016/0009-2614(85)85331-8 / Chem. Phys. Lett. (1985)
10.1016/0021-9797(85)90028-1 / J. Colloid Interface Sci. (1985)
10.1063/1.449693 / J. Chem. Phys. (1985)
10.1039/f19787400975 / J. Chem. Soc. Faraday Trans. 1 (1978)
10.1016/0021-9797(84)90177-2 / J. Colloid Interface Sci. (1984)
{'key': '2024021004080775000_r15'}
{'key': '2024021004080775000_r16'}
10.1063/1.446328 / J. Chem. Phys. (1983)
10.1103/PhysRevLett.52.557 / Phys. Rev. Lett. (1984)
10.1063/1.450352 / J. Chem. Phys. (1986)
10.1080/00268978500102521 / Mol. Phys. (1985)
{'key': '2024021004080775000_r21'}

Dates

Type	When
Created	23 years, 1 month ago (July 26, 2002, 9:08 a.m.)
Deposited	1 year, 6 months ago (Feb. 10, 2024, 12:26 a.m.)
Indexed	1 month, 3 weeks ago (July 13, 2025, 10:30 p.m.)
Issued	38 years, 8 months ago (Jan. 1, 1987)
Published	38 years, 8 months ago (Jan. 1, 1987)
Published Print	38 years, 8 months ago (Jan. 1, 1987)

Funders 0

None

BibTeX

@article{Christenson_1987, title={Solvation forces and phase separation of water in a thin film of nonpolar liquid between mica surfaces}, volume={86}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.452580}, DOI={10.1063/1.452580}, number={1}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Christenson, Hugo K. and Blom, Christina E.}, year={1987}, month=jan, pages={419–424} }

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