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Issue 15, 2010
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Patterns in the Belousov–Zhabotinsky reaction in water-in-oil microemulsion induced by a temperature gradient

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Abstract

We investigate the effect of changing temperature in the ferroin-catalysed Belousov–Zhabotinsky (BZ) reaction dispersed in the water nanodroplets of a water-in-oil aerosol OT (AOT) microemulsion, which undergoes a temperature-induced percolation transition at about 38 °C. We observe stationary Turing patterns at temperatures in the range 15–35 °C and bulk oscillations at T = 40–55 °C. When a temperature gradient ΔT is applied normal to a thin layer of the BZ–AOT reaction mixture, the range of patterns observed is dramatically expanded. Anti-phase oscillatory Turing patterns, leaping waves, and chaotic waves emerge, depending on the temperature gradient and the average temperature. These new patterns originate from the coupling between a low temperature Turing mode and a high temperature Hopf mode. Simulations with a simple model of the BZ–AOT system give good agreement with our experimental results.

Graphical abstract: Patterns in the Belousov–Zhabotinsky reaction in water-in-oil microemulsion induced by a temperature gradient

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Article information


Submitted
16 Sep 2009
Accepted
25 Jan 2010
First published
23 Feb 2010

Phys. Chem. Chem. Phys., 2010,12, 3656-3665
Article type
Paper

Patterns in the Belousov–Zhabotinsky reaction in water-in-oil microemulsion induced by a temperature gradient

J. Carballido-Landeira, V. K. Vanag and I. R. Epstein, Phys. Chem. Chem. Phys., 2010, 12, 3656
DOI: 10.1039/B919278F

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