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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.

Authors

Edward Yu Bormashenko

Mark Frenkel

Yelena Bormashenko

Gilad Chaniel

Victor A. Valtsifer



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.

Journal Article Type Article
Publication Date Nov 21, 2017
Journal Langmuir
Print ISSN 0743-7463
Electronic ISSN 1520-5827
Publisher American Chemical Society
Peer Reviewed Peer Reviewed
Volume 33
Issue 46
Pages 13234-13241
APA6 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. doi:10.1021/acs.langmuir.7b03356
DOI https://doi.org/10.1021/acs.langmuir.7b03356
Keywords Liquid marbles; Self-propulsion
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.

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