The study of morphology and shape development has gained considerable interest in certain sciences, notably biology and geology. Liesegang experiments producing Co(OH)${}_2$ stratification are performed here, in one, two, and three dimensions for comparison of the pattern morphologies. We obtain well-resolved bands in one dimension, target patterns (rings) in two dimensions, and onion patterns (spherical shells) in three dimensions. The morphological characteristics of the various patterns (spacing coefficients, rate of growth of ring spacing with distance) were measured. The spacing ratio of the strata in the different spatial dimensions was found to be anticorrelated with the surface-to-volume ratio of the gel domain. Some studies featuring the importance of morphology in Liesegang systems are briefly surveyed.

• Received 4 May 2010

DOI:https://doi.org/10.1103/PhysRevE.83.016109