Encoding information into precipitation structures

Details Encoding information into precipitation structures Encoding information into precipitation structures

2008-10-28

arxiv.org/abs/0810.5019v1

J. Stat. Mech. (2008) P12003

Physics

Condensed Matter

Statistical Mechanics

13 pages, 7 figures, presented at SigmaPhi 2008

Scientific paper

10.1088/1742-5468/2008/12/P12003

Material design at submicron scales would be profoundly affected if the formation of precipitation patterns could be easily controlled. It would allow the direct building of bulk structures, in contrast to traditional techniques which consist of removing material in order to create patterns. Here, we discuss an extension of our recent proposal of using electrical currents to control precipitation bands which emerge in the wake of reaction fronts in A^{+} + B^{-} -> C reaction-diffusion processes. Our main result, based on simulating the reaction-diffusion-precipitation equations, is that the dynamics of the charged agents can be guided by an appropriately designed time-dependent electric current so that, in addition to the control of the band spacing, the width of the precipitation bands can also be tuned. This makes straightforward the encoding of information into precipitation patterns and, as an amusing example, we demonstrate the feasibility by showing how to encode a musical rhythm.

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