title: Target Turing patterns and growth dynamics in the chlorine dioxide-iodine-malonic acid reaction.
abstract: We study the growth dynamics of Turing patterns in the chlorine dioxide-iodine-malonic acid reaction-diffusion system in response to perturbations with visible light. We describe several mechanisms by which Turing patterns reappear after they are suppressed by illumination with a disc-shaped geometry. We observe that under specific conditions the patterns reorganize from a random configuration of spots and stripes to a set of ordered, concentric rings, which we refer to as target Turing patterns. These patterns closely resemble the unit cells of the Turing hexagonal superlattices known as black eye patterns. However, these target Turing patterns are not part of a larger superlattice structure, and they usually have a larger number of concentric rings. Numerical simulations support the experimental findings.
authors.affiliation: Department of Chemistry, Brandeis University , Waltham, Massachusetts 02454-9110, United States.
authors.forename: Asher
authors.initials: A
authors.lastname: Preska Steinberg
authors.forename: Irving R
authors.initials: IR
authors.lastname: Epstein
authors.forename: Milos
authors.initials: M
authors.lastname: Dolnik
mesh_terms: D017606:Chlorine Compounds / Q000737:chemistry*; D007455:Iodine / Q000737:chemistry*; D008314:Malonates / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D010316:Particle Size; D013499:Surface Properties; D013816:Thermodynamics
chemical_list: D017606:Chlorine Compounds; D008314:Malonates; D010087:Oxides; C025109:chlorine dioxide; D007455:Iodine; C030290:malonic acid