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 because both a patterned state and a homogeneous dark state are stable under these conditions (bistability). The period shown in the movie is nearly two hours. More details can be found in:
A. Kaminaga, V. K. Vanag, and I. R. Epstein, “A reaction-diffusion memory device,” Angew. Chem. Int. Ed. 45, 3087-3089 (2006).
