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Effective spring constant of bubbles and droplets
Linköping University, The Institute of Technology. Linköping University, Department of Science and Technology.
2001 (English)In: Langmuir, ISSN 0743-7463, Vol. 17, no 26, 8217-8223 p.Article in journal (Refereed) Published
Abstract [en]

It is shown that gas bubbles and liquid droplets respond as hookean springs to applied loads in the experimental weak force regime. An analytic expression is obtained for the spring constant that is identical for both, linear in the surface tension gamma, and logarithmically dependent on the lengths (the decay length of the interaction, the radius of the bubble or droplet, and the radius of the particle or probe). For acute interior contact angles greater than about 20 degrees, it is typically in the range 0.8-1.2 gamma, in agreement with published atomic force microscopy data, and it increases logarithmically for smaller contact angles. Analytic expressions are also obtained for the deformed profile, the extent of the dimple and of the interaction region, the wrapping radius, and the rupture force.

Place, publisher, year, edition, pages
2001. Vol. 17, no 26, 8217-8223 p.
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-47914DOI: 10.1021/la010969gOAI: diva2:268810
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2011-01-13

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Miklavcic, Stan
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The Institute of TechnologyDepartment of Science and Technology
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