Diffusively Coupled Chemical Oscillators in a Microfluidic Assembly

Droplets containing BZ reactants are separated by octane in thin glass capillaries. They are horisontally coupled to their immediate neighbors diffusively via bromine, an inhibitory specie produced in the reaction.

A reaction-diffusion memory device

This movie shows a pattern imprinted on a BZ-AOT microemulsion. Light is projected through a strip of film (mask) containing the pattern onto the photosensitive microemulsion. When the mask is removed, the pattern persists.

Accelerating Waves

This movie shows accelerating waves in a BZ-AOT media. In ordinary aqueous media, BZ waves travel at constant velocity and disappear when they collide with each other rather than bouncing off, as it can be seen in this movie.


In contrast to spirals, antipirals move inward toward their center.

Pattern formation associated with the wave instability

Regular clusters in the BZ reaction with global feedback - Experiments

Localized, complex, and 3-phase clusters - Experiments

Oscillatory clusters in a model of the BZ reaction with global feedback

3-phase clusters in a model of the BZ reaction with global feedback

Oscillatory Turing patterns

Square Turing patterns

Superlattice Turing patterns

Calcium waves

Last update: 03/23/09