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Long-Range Attractive Force Between Hydrophobic Surfaces Observed by Atomic Force Microscopy

Yi-Hua Tsao, D. Fennell Evans and H. Wennerström
Science
New Series, Vol. 262, No. 5133 (Oct. 22, 1993), pp. 547-550
Stable URL: http://www.jstor.org/stable/2882574
Page Count: 4
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Long-Range Attractive Force Between Hydrophobic Surfaces Observed by Atomic Force Microscopy
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Abstract

There is evidence from atomic force microscopy for a long-range attractive force between hydrophobic surfaces that is virtually identical to that observed with the surface forces apparatus. This force is present in the nonaqueous solvent ethylene glycol. A possible molecular mechanism involves in-plane polarized domains of solid-like monolayers adsorbed on mica, and a theoretical model has been developed that accounts for many of the observations.

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