Complex patterns in reactive microemulsions: self-organized nanostructures?
In a reverse microemulsion consisting of water, oil (octane), an anionic surfactant [aerosol OT (AOT)], and the reactants of the oscillating Belousov-Zhabotinsky (BZ) reaction, a variety of complex spatiotemporal patterns appear. These include traveling and standing waves, spirals that move either toward or away from their centers, spatiotemporal chaos, Turing patterns, segmented waves, and localized structures, both stationary and oscillatory. The system consists of nanometer-sized droplets of water containing the BZ reactants surrounded by a monolayer of AOT, swimming in a sea of oil, through which nonpolar BZ intermediates can diffuse rapidly. We present experimental and computational results on this fascinating system and comment on possible future directions for research.
Epstein
Irving R
IR
Department of Chemistry and Volen Center for Complex Systems, Brandeis University MS 015, Waltham, Massachusetts 02454-9110, USA. epstein@brandeis.edu
Vanag
Vladimir K
VK
D003198:Computer Simulation; D003460:Crystallization / Q000379:methods*; D004655:Emulsions / Q000032:analysis / Q000737:chemistry*; D008956:Models, Chemical; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D044367:Phase Transition
D004655:Emulsions