Superposition of translational and rotational motions under self-propulsion of liquid marbles filled by aqueous solutions of camphor

Bormashenko, Edward Yu; Frenkel, Mark; Bormashenko, Yelena; Chaniel, Gilad; Valtsifer, Victor A.; Binks, Bernard P.

Abstract

Self-locomotion of liquid marbles, coated with lycopodium or fumed fluorosilica powder, filled with a saturated aqueous solution of camphor and placed on a water/vapor interface is reported. Self-propelled marbles demonstrated a complicated motion, representing a superposition of translational and rotational motions. Oscillations of the velocity of the center of mass and the angular velocity of marbles, occurring in anti-phase, were registered and explained qualitatively. Self-propulsion occurs due to the Marangoni soluto-capillary flow inspired by the adsorption of camphor (evaporated from the liquid marble) by a water surface. Scaling laws describing translational and rotational motions are proposed and checked. The rotational motion of marbles arises from the asymmetry of the field of the Marangoni stresses due to the adsorption of camphor evaporated from a marble.

Citation

Bormashenko, E. Y., Frenkel, M., Bormashenko, Y., Chaniel, G., Valtsifer, V. A., & Binks, B. P. (2017). Superposition of translational and rotational motions under self-propulsion of liquid marbles filled by aqueous solutions of camphor. Langmuir : the ACS journal of surfaces and colloids, 33(46), 13234-13241. https://doi.org/10.1021/acs.langmuir.7b03356

• Journal Article Type: Article
• Acceptance Date: Oct 29, 2017
• Online Publication Date: Oct 30, 2017
• Publication Date: Nov 21, 2017
• Deposit Date: Nov 2, 2017
• Publicly Available Date: Oct 31, 2018
• Journal: Langmuir
• Print ISSN: 0743-7463
• Publisher: American Chemical Society
• Peer Reviewed: Peer Reviewed
• Volume: 33
• Issue: 46
• Pages: 13234-13241
• DOI: https://doi.org/10.1021/acs.langmuir.7b03356
• Keywords: Liquid marbles; Self-propulsion
• Public URL: https://hull-repository.worktribe.com/output/456249
• Publisher URL: http://pubs.acs.org/doi/abs/10.1021/acs.langmuir.7b03356
• Additional Information: This is the accepted manuscript of an article published in Langmuir, 2017. The version of record is available at the DOI link in this record.
• Contract Date: Nov 2, 2017