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Wetting of hydrocarbon liquid surfaces by fluorocarbon vapor: a microscopic study
Publikationstyp
Conference Paper
Date Issued
2002-03-21
Sprache
English
Volume
206
Issue
1/3
Start Page
293
End Page
297
Citation
Colloids and Surfaces A: Physicochemical and Engineering Aspects 206 (1/3): 293-297 (2002-07-09)
Publisher DOI
Scopus ID
Publisher
Elsevier Science
The wetting of the liquid fluorocarbon (perfluoromethylcyclohexane) on the liquid hydrocarbon (eicosane) surface was studied just above the eicosane melting point, where the eicosane exhibits surface freezing (SF) behavior. The thickness of the wetting layer was controlled by changing the fluorocarbon chemical potential relative to the reservoir through temperature differences ΔT. The evolution of the microscopic structure of the fluorocarbon layer along the normal-to-surface was measured in situ using X-ray reflectivity. Observed effects include suppression of the SF phase for the thinnest absorbed fluorocarbon layer (d∼7 Å) as well as complete wetting that following the d∼ΔT-1/3 law.
Subjects
Alkane
Fluorocarbon
Hydrocarbon
Surface
Wetting
X-ray reflectivity
DDC Class
530: Physik
More Funding Information
Work supported by NSF-DMR-98-72817 and Rothschild Foundation.