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Accelerated dynamics in active media: from Turing patterns to Sparkling waves.

par Carballido Landeira, Jorge ;Munuzuri, Alberto A.P.
Référence Langmuir
Publication A Paraître, 2015-03

Article révisé par les pairs

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Résumé :

We report the destabilization of stationary Turing patterns and subsequent emergence of fast spatio-temporal dynamics induced by the percolation transition of an anionic microemulsion. The localized hexagonal Turing spots switch from a stationary regime into a dynamics state by exhibiting spatial oscillations with two characteristic wavelengths and one representative temporal period. These Oscillatory Turing Spots are not temporally stable and evolve into traveling spiral tips that, in addition to the unexpected birth of Spots rapidly transformed into target patterns, originate multiple collisions and wave breakups due their proximity, degenerating into a chaotic scenario.