Fig. 2: Three-zoned standing reaction-diffusion structures in two-channel experiments. | Communications Chemistry

Fig. 2: Three-zoned standing reaction-diffusion structures in two-channel experiments.

From: A simple hydrogel device with flow-through channels to maintain dissipative non-equilibrium phenomena

Fig. 2

Acidic stripe formation in the H+ autocatalytic bromate-sulfite reaction (a) and precipitate formation in the CaCO3 system (b–e). Space-time plots of the stabilization of the patterns (a, b), snapshot in the x–y plane at 4 h (c), and optical microscope images made right after the synthesis (d, e). The pictures are taken from the reacting zone between the channels denoted by A and B. Experimental conditions: a [BrO3−]A = 200 mM, [H2SO4]B = (5→)6 mM, [SO32−]A,B = 80 mM, [Fe(CN)64−]A,B = 10 mM, [BCG]A,B = 0.1 mM, w = 2.5 mm, T = 35 °C; b–e [Ca2+]A = [CO32−]B = 150 mM, w = 10 mm, T = 25 °C.

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