Pentanary cross-diffusion in water-in-oil microemulsions loaded with two components of the Belousov-Zhabotinsky reaction |
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Authors: | Rossi Federico Vanag Vladimir K Epstein Irving R |
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Affiliation: | Department of Chemistry and Volen Center for Complex System, MS 015, Brandeis University, Waltham MA 02454-9110, USA. |
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Abstract: | We measure cross-diffusion coefficients in a five-component system, an aerosol OT (AOT) water-in-oil microemulsion loaded with two constituents of the Belousov-Zhabotinsky (BZ) reaction (H(2) O/AOT/BZ1/BZ2/octane). The species BZ1 is either NaBr, an inhibitor of the BZ reaction, or ferroin, a catalyst for the reaction. As species BZ2, we choose Br(2) , an intermediate in the reaction. The cross-diffusion coefficients between BZ1 and BZ2 are found to be negative, which can be understood in terms of complexation between these species. Using a four-variable model for the BZ reaction, we find that the cross-diffusion coefficients measured here can lead to a noticeable shift in the onset of Turing instability in the BZ-AOT system. |
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Keywords: | Belousov–Zhabotinsky reaction diffusion dissipative processes reverse microemulsions Taylor dispersion |
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