Interfacial mechanisms in active emulsions

Herminghaus, S, Maass, CC, Krüger, C, Thutupalli, S, Goehring, L ORCID: 0000-0002-3858-7295 and Bahr, C, 2014. Interfacial mechanisms in active emulsions. Soft Matter, 10 (36), pp. 7008-7022. ISSN 1744-683X

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Abstract

Active emulsions, i.e., emulsions whose droplets perform self-propelled motion, are of tremendous interest for mimicking collective phenomena in biological populations such as phytoplankton and bacterial colonies, but also for experimentally studying rheology, pattern formation, and phase transitions in systems far from thermal equilibrium. For fuelling such systems, molecular processes involving the surfactants which stabilize the emulsions are a straightforward concept. We outline and compare two different types of reactions, one which chemically modifies the surfactant molecules, the other which transfers them into a different colloidal state. While in the first case symmetry breaking follows a standard linear instability, the second case turns out to be more complex. Depending on the dissolution pathway, there is either an intrinsically nonlinear instability, or no symmetry breaking at all (and hence no locomotion).

Item Type: Journal article
Publication Title: Soft Matter
Creators: Herminghaus, S., Maass, C.C., Krüger, C., Thutupalli, S., Goehring, L. and Bahr, C.
Publisher: Royal Society of Chemistry
Date: 2014
Volume: 10
Number: 36
ISSN: 1744-683X
Identifiers:
NumberType
10.1039/C4SM00550CDOI
Divisions: Schools > School of Science and Technology
Depositing User: Linda Sullivan
Date Added: 05 Sep 2016 13:34
Last Modified: 09 Jun 2017 14:05
URI: http://irep.ntu.ac.uk/id/eprint/28387

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