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Electrotaxis behavior of droplets composed of aqueous Belousov-Zhabotinsky solutions suspended in oil phase
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Back, Oliver, Asally, Munehiro, Wang, Zuowei and Hayashi, Yoshikatsu (2023) Electrotaxis behavior of droplets composed of aqueous Belousov-Zhabotinsky solutions suspended in oil phase. Scientific Reports, 13 (1). 1340. doi:10.1038/s41598-023-27639-8 ISSN 2045-2322.
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Official URL: https://doi.org/10.1038/s41598-023-27639-8
Abstract
Taxis is ubiquitous in biological and physical chemistry systems as a response to various external stimulations. We prepared aqueous droplets containing Belousov-Zhabotinsky (BZ) solutions suspended on an oleic acid oil phase subject to DC electric field and found that these BZ droplets undergo chemically driven translational motion towards the negative electrode under DC electric field. This electrotaxis phenomenon originates from the field-induced inhomogeneous distribution of reactants, in particular Br- ions, and consequently the biased location of the leading centers towards the positive electrode. We define the ’leading center’ (LC) as a specific location within the droplet where the BZ chemical wave (target pattern) is initiated. The chemical wave generated from the LC propagates passing the droplet center of mass and creates a gradient of interfacial tension when reaching the droplet-oil interface on the other side, resulting in a momentum exchange between the droplet and oil phases which drives the droplet motion in the direction of the electric field. A greater electric field strength renders a more substantial electrotaxis effect.
| Item Type: | Journal Article | ||||||
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| Subjects: | Q Science > QD Chemistry Q Science > QH Natural history |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | ||||||
| SWORD Depositor: | Library Publications Router | ||||||
| Library of Congress Subject Headings (LCSH): | Cell migration, Taxes (Biology), Belousov-Zhabotinskii reaction | ||||||
| Journal or Publication Title: | Scientific Reports | ||||||
| Publisher: | Nature Publishing Group | ||||||
| ISSN: | 2045-2322 | ||||||
| Official Date: | 24 January 2023 | ||||||
| Dates: |
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| Volume: | 13 | ||||||
| Number: | 1 | ||||||
| Article Number: | 1340 | ||||||
| DOI: | 10.1038/s41598-023-27639-8 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||
| Date of first compliant deposit: | 30 January 2023 | ||||||
| Date of first compliant Open Access: | 30 January 2023 |
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