As-placed contact angles for sessile drops
As-placed contact angle is the contact angle a drop adapts as a result of its placement on a surface. As expected, the as-placed contact angle, θ AP , of a sessile drop on a horizontal surface decreases with the drop size due to the increase in hydrostatic pressure. We present a theoretical predicti...
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Published in | Journal of colloid and interface science Vol. 317; no. 1; pp. 241 - 246 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
San Diego, CA
Elsevier Inc
2008
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | As-placed contact angle is the contact angle a drop adapts as a result of its placement on a surface. As expected, the as-placed contact angle,
θ
AP
, of a sessile drop on a horizontal surface decreases with the drop size due to the increase in hydrostatic pressure. We present a theoretical prediction for
θ
AP
which shows that it is a unique function of the advancing contact angle,
θ
A
, drop size, and material properties (surface tensions and densities). We test our prediction with published and new data. The theory agrees with the experiments. From the relation of the as-placed contact angle to drop size the thermodynamic equilibrium contact angle is also calculated. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0021-9797 1095-7103 |
DOI: | 10.1016/j.jcis.2007.09.029 |