Journal
SOFT MATTER
Volume 13, Issue 21, Pages 3879-3884Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7sm00097a
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Funding
- Agence Nationale de la Recherche [ANR-12-BS09-0021- 01]
- Agence Nationale de la Recherche (ANR) [ANR-12-BS09-0021] Funding Source: Agence Nationale de la Recherche (ANR)
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In this paper, we study the dynamics of cylindrical armoured bubbles excited by mechanical vibrations. A step by step transition from cylindrical to spherical shape is reported as the intensity of the vibration is increased, leading to a reduction of the bubble surface and a dissemination of the excess particles. We demonstrate through energy balance that nonspherical armoured bubbles constitute a metastable state. The vibration instills the activation energy necessary for the bubble to return to its least energetic stable state: a spherical armoured bubble. At this point, particle desorption can only be achieved through higher amplitude of excitation required to overcome capillary retention forces. Nonspherical armoured bubbles open perspectives for tailored localized particle dissemination with limited excitation power.
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