Volume 54, Number 4, May 2001
|Page(s)||533 - 539|
|Section||Interdisciplinary physics and related areas of science and technology|
|Published online||01 December 2003|
Prewetting transition on a weakly disordered substrate: Evidence for a creeping film dynamics
Laboratoire Kastler Brossel, Ecole Normale Supérieure
24 rue Lhomond, F75231 Paris cedex 05, France
Accepted: 7 March 2001
We present the first microscopic images of the prewetting transition of a liquid film on a solid surface. Pictures of the local coverage map of a helium film on a cesium metal surface are taken while the temperature is raised through the transition. The film edge is found to advance at constant temperature by successive avalanches in a creep motion with a macroscopic correlation length. The creep velocity varies strongly in a narrow temperature range. The retreat motion is obtained only at much lower temperature, conforming to the strong hysteresis observed for prewetting transition on a disordered surface. Prewetting transition on such disordered surfaces appears to give rise to dynamical phenomena similar to what is observed for domain wall motions in 2D magnets.
PACS: 81.15.Lm – Liquid phase epitaxy; deposition from liquid phases (melts, solutions, and surface layers on liquids) / 68.15.+e – Liquid thin films / 68.35.Rh – Phase transitions and critical phenomena
© EDP Sciences, 2001
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.