Designer Patterns: Flexible Control of Precipitation through Electric Currents
Other Condensed Matter
2008-11-13 v1 Materials Science
Pattern Formation and Solitons
Chemical Physics
Abstract
Precipitation patterns generated by A^{+}+B^{-} --> C type reaction-diffusion processes are studied. It is shown both theoretically and experimentally that the patterns can be controlled by an appropriately designed, time-dependent electric current in the system. We describe examples of current dynamics yielding periodic bands of prescribed wavelength, as well as more complicated structures. The pattern control is demonstrated experimentally on the reaction-diffusion-precipitation process 2AgNO_3+K_2Cr_2O_7 --> Ag_2Cr_2O_7+2KNO_3 taking place in a gel.
Cite
@article{arxiv.0802.2690,
title = {Designer Patterns: Flexible Control of Precipitation through Electric Currents},
author = {Ioana Bena and Michel Droz and Istvan Lagzi and Kirsten Martens and Zoltan Racz and Andras Volford},
journal= {arXiv preprint arXiv:0802.2690},
year = {2008}
}
Comments
4 pages, 6 figures