Contact-line friction of liquid drops on self-assembled monolayers: chain-length effects.

Autor: Voué M; Centre de Recherches en Modélisation Moléculaire, Université de Mons-Hainaut/Materia Nova, Parc Initialis, Av. Copernic, 1, B-7000 Mons, Belgium. michel.voue@crmm.umh.ac.be, Rioboo R, Adao MH, Conti J, Bondar AI, Ivanov DA, Blake TD, De Coninck J
Jazyk: angličtina
Zdroj: Langmuir : the ACS journal of surfaces and colloids [Langmuir] 2007 Apr 24; Vol. 23 (9), pp. 4695-9. Date of Electronic Publication: 2007 Mar 28.
DOI: 10.1021/la062884r
Abstrakt: The static and dynamic wetting properties of self-assembled alkanethiol monolayers of increasing chain length were studied. The molecular-kinetic theory of wetting was used to interpret the dynamic contact angle data and evaluate the contact-line friction on the microscopic scale. Although the surfaces had a similar static wettability, the coefficient of contact-line friction zeta0 increased linearly with alkyl chain length. This result supports the hypothesis of energy dissipation due to a local deformation of the nanometer-thick layer at the contact line.
Databáze: MEDLINE