Long-lasting dashed waves in a reactive microemulsion
Palabra(s) clave:
Dinámica no lineal de sistemas activos
Microemulsiones y polímeros activos
Estructuras espacio-temporales
Física no Lineal
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RSC
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Resumen:
In the Belousov–Zhabotinsky (BZ) reaction carried out in a reverse microemulsion with Aerosol OT as surfactant, the existence of two different sizes of droplets containing the BZ reactants leads to the emergence of segmented (dashed) waves. This bimodal distribution of sizes is stabilized by adding small amounts of the homopolymer poly(ethylene oxide) (PEO). Addition of PEO lengthens the period during which these patterns are observed, so that dashed waves can persist for 12–14 h, in contrast to the 2–3 h found in earlier studies without added polymer.
In the Belousov–Zhabotinsky (BZ) reaction carried out in a reverse microemulsion with Aerosol OT as surfactant, the existence of two different sizes of droplets containing the BZ reactants leads to the emergence of segmented (dashed) waves. This bimodal distribution of sizes is stabilized by adding small amounts of the homopolymer poly(ethylene oxide) (PEO). Addition of PEO lengthens the period during which these patterns are observed, so that dashed waves can persist for 12–14 h, in contrast to the 2–3 h found in earlier studies without added polymer.
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This work was supported by the MCyT (Spain) under projects FIS2004-03006 and FIS2007-64698, Xunta de Galicia (Spain); under project PGIDIT05PXIC20607PN and the National Science Foundation under grant CHE 0615507.
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