Effect of capillary pressure and surface tension on the deformation of elastic surfaces by sessile liquid microdrops: An experimental investigation

Sessile liquid drops are predicted to deform an elastic surface onto which they are placed because of the combined action of the liquid surface tension at the periphery of the drop and the capillary pressure inside the drop. Here, we show for the first time the in situ experimental confirmation of the effect of capillary pressure on this deformation. We demonstrate micrometer-scale deformations made possible by using a low Young's modulus material as an elastic surface. The experimental profiles of the deformed surfaces fit well the theoretical predictions for surfaces with a Young's modulus between 25 and 340 kPa.


Published in:
Langmuir, 24, 10565-10568
Year:
2008
Publisher:
American Chemical Society
ISSN:
0743-7463
Keywords:
Laboratories:


Note: The status of this file is: EPFL only


 Record created 2010-05-12, last modified 2018-09-13

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