A floating self-propelling liquid marble containing aqueous ethanol solutions

Ooi, Chin Hong, Nguyen, Anh Van, Evans, Geoffrey M., Gendelman, Oleg, Bormashenko, Edward and Nguyen, Nam-Trung (2015) A floating self-propelling liquid marble containing aqueous ethanol solutions. RSC Advances, 5 122: 101006-101012. doi:10.1039/c5ra23946j

Author Ooi, Chin Hong
Nguyen, Anh Van
Evans, Geoffrey M.
Gendelman, Oleg
Bormashenko, Edward
Nguyen, Nam-Trung
Title A floating self-propelling liquid marble containing aqueous ethanol solutions
Journal name RSC Advances   Check publisher's open access policy
ISSN 2046-2069
Publication date 2015-11-18
Year available 2015
Sub-type Article (original research)
DOI 10.1039/c5ra23946j
Open Access Status Not yet assessed
Volume 5
Issue 122
Start page 101006
End page 101012
Total pages 7
Place of publication Cambridge, United Kingdom
Publisher Royal Society of Chemistry
Collection year 2016
Language eng
Formatted abstract
A liquid marble is a droplet coated with hydrophobic particles. A floating liquid marble is a unique reactor platform for digital microfluidics. The autonomous motion of a liquid marble is of great interest for this application because of the associated chaotic mixing inside the marble. A floating object can move by itself if a gradient of surface tension is generated in the vicinity of the object. This phenomenon is known as the Marangoni solutocapillary effect. We utilized a liquid marble containing a volatile substance such as ethanol to generate the solutocapillary effect. This paper reports a qualitative study on the operation conditions of liquid marbles containing aqueous ethanol solutions in autonomous motion due to the Marangoni solutocapillary effect. We also derive the scaling laws relating the dynamic parameters of the motion to the physical properties of the system such as the effective surface tension of the marble, the viscosity and the density of the supporting liquid, the coefficient of diffusion of the ethanol vapour, the geometrical parameters of the marble, the speed, the trajectory and the lifetime of the autonomous motion. A self-driven liquid marble has the potential to serve as an effective digital microfluidic reactor for biological and biochemical applications.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2016 Collection
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Citation counts: TR Web of Science Citation Count  Cited 3 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 3 times in Scopus Article | Citations
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