Precursor Film Profiles of Spreading Liquid Drops
- 6 June 1988
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 60 (23) , 2390-2393
- https://doi.org/10.1103/physrevlett.60.2390
Abstract
We present the first precise characterization of the profile of the precursor films which progressively develop ahead of the macroscopic edge of a spreading liquid drop. Experiments are performed on a model system (nonvolatile high-molecular-weight polydimethylsiloxane on smooth silicon wafers), using an ellipsometer with a high spatial resolution. Both the film profile and its evolution with time are in good qualitative agreement with recent models which include long-range force effects. Clear quantitative discrepancies may reveal specific polymeric effects.Keywords
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