Designed patterns: flexible control of precipitation through electric currents.
- Bena I Theoretical Physics Department, University of Geneva, CH-1211 Geneva 4, Switzerland.
- Droz M
- Lagzi I
- Martens K
- Rácz Z
- Volford A
- 2008-09-04
Published in:
- Physical review letters. - 2008
English
Understanding and controlling precipitation patterns formed in reaction-diffusion processes is of fundamental importance with high potential for technical applications. Here we present a theory showing that precipitation resulting from reactions among charged agents can be controlled by an appropriately designed, time-dependent electric current. Examples of current dynamics yielding periodic bands of prescribed wavelength, as well as more complicated structures are given. The pattern control is demonstrated experimentally using the reaction-diffusion process 2AgNO3 + K2Cr2O7-->under Ag2Cr2O7 + 2KNO3.
- Language
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- English
- Open access status
- green
- Identifiers
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- DOI 10.1103/PhysRevLett.101.075701
- PMID 18764550
- Persistent URL
- https://sonar.ch/global/documents/221726
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