What is it about?
This paper reports a new class of periodic banding of Fe(OH)3 precipitate through reaction–diffusion–reaction processes in agarose gel sandwiched between two metal rods (Ti and Fe) with cyclic alternating voltages.
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Why is it important?
Periodic precipitation banding (Liesegang banding) has been continuously investigated since its discovery. It still attracts considerable scientific interest as a self-assembling nonequilibrium phenomenon. Nevertheless, periodic banding is only observed for relatively few combinations of coprecipitating chemicals and supporting media. Hence, to cultivate a better understanding of periodic banding and develop its new applications, it is important to thoroughly explore physico-chemical systems wherein periodic precipitation bands can form.
Perspectives
This novel and interesting periodic banding system is expected to broaden the research field of non-equilibrium physics. Hence, this system warrants further investigation.
Dr Hisashi Hayashi
Japan Women's University
Read the Original
This page is a summary of: Periodic band formation of Fe(OH)3 precipitate through reaction–diffusion–reaction processes, Frontiers in Physics, February 2023, Frontiers,
DOI: 10.3389/fphy.2023.1114106.
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