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Thermal switch of oscillation frequency in belousov- zhabotinsky liquid marbles

Adamatzky, Andrew; Fullarton, Claire; Phillips, Neil; Costello, Ben De Lacy; Draper, Thomas C.

Authors

Claire Fullarton Claire.Fullarton@uwe.ac.uk
Research Associate in Chemistry anf Material Sciences (Liquid Marbles)

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Dr Neil Phillips Neil.Phillips@uwe.ac.uk
Research Associate in CWCR (ENDOWS Drought)

Thomas Draper Tom.Draper@uwe.ac.uk
Research Associate in Chemistry and Unconventional Computing



Abstract

© 2019 The Authors. External control of oscillation dynamics in the Belousov- Zhabotinsky (BZ) reaction is important for many applications including encoding computing schemes. When considering the BZ reaction, there are limited studies dealing with thermal cycling, particularly cooling, for external control. Recently, liquid marbles (LMs) have been demonstrated as a means of confining the BZ reaction in a system containing a solid-liquid interface. BZ LMs were prepared by rolling 50 ml droplets in polyethylene (PE) powder. Oscillations of electrical potential differences within the marble were recorded by inserting a pair of electrodes through the LM powder coating into the BZ solution core. Electrical potential differences of up to 100mV were observed with an average period of oscillation ca 44 s. BZ LMs were subsequently frozen to 218C to observe changes in the frequency of electrical potential oscillations. The frequency of oscillations reduced upon freezing to 11mHz cf. 23 mHz at ambient temperature. The oscillation frequency of the frozen BZ LM returned to 23 mHz upon warming to ambient temperature. Several cycles of frequency fluctuations were able to be achieved.

Journal Article Type Article
Publication Date Apr 1, 2019
Journal Royal Society Open Science
Electronic ISSN 2054-5703
Publisher Royal Society, The
Peer Reviewed Peer Reviewed
Volume 6
Issue 4
Pages 190078
APA6 Citation Adamatzky, A., Fullarton, C., Phillips, N., Costello, B. D. L., & Draper, T. C. (2019). Thermal switch of oscillation frequency in belousov- zhabotinsky liquid marbles. Royal Society Open Science, 6(4), 190078. https://doi.org/10.1098/rsos.190078
DOI https://doi.org/10.1098/rsos.190078
Keywords liquid marble, Belousov–Zhabotinsky, oscillation, thermal control
Publisher URL http://doi.org/10.1098/rsos.190078

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