Pentanary cross-diffusion in water-in-oil microemulsions loaded with two components of the Belousov-Zhabotinsky reaction.
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.
Department of Chemistry and Volen Center for Complex System, MS 015, Brandeis University, Waltham MA 02454-9110, USA.
Federico
F
Rossi
Vladimir K
VK
Vanag
Irving R
IR
Epstein
D002384:Catalysis; D004058:Diffusion; D004655:Emulsions / Q000737:chemistry*; D009821:Oils / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
D004655:Emulsions; D009821:Oils; D014867:Water