Spreading dynamics of 2D dipolar Langmuir monolayer phases
Department of Chemistry and Biochemistry, The Florida State University, FL 32306, Tallahassee, USA
2 Pentapharm GmbH Diagnostic Division, Kreillerstrasse 21, 81673, Munich, Germany
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We study the spreading of a liquid 2D dipolar droplet in a Langmuir monolayer. Interfacial tensions (line tensions) and microscopic contact angles depend on the scale on which they are probed and obey a scaling law. Assuming rapid equilibration of the microscopic contact angle and ideal slippage of the 2D solid/liquid and solid/gas boundary, the driving force of spreading is merely expressed by the shape-dependent long-range interaction integrals. We obtain good agreement between experiment and numerical simulations using this theory.
© EDP Sciences, Società Italiana di Fisica, and Springer-Verlag, 2004