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Guiding chemical pulses through geometry: Y junctions

MPS-Authors
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Kevrekidis,  Ioannis G.
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Punckt,  Christian
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Rotermund,  Harm H.
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Fulltext (public)

PhysRevE.73.036219.pdf
(Publisher version), 477KB

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Citation

Qiao, L., Kevrekidis, I. G., Punckt, C., & Rotermund, H. H. (n.d.). Guiding chemical pulses through geometry: Y junctions. Physical Review E, 73(3), 036219–1-036219–7. doi:10.1103/PhysRevE.73.036219.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0011-23BF-1
Abstract
We study computationally and experimentally the propagation of chemical pulses in complex geometries. The reaction of interest, CO oxidation, takes place on single crystal Pt(110) surfaces that are microlithographically patterned; they are also addressable through a focused laser beam, manipulated through galvanometer mirrors, capable of locally altering the crystal temperature and thus affecting pulse propagation. We focus on sudden changes in the domain shape (corners in a Y-junction geometry) that can affect the pulse dynamics; we also show how brief, localized temperature perturbations can be used to control reactive pulse propagation. The computational results are corroborated through experimental studies in which the pulses are visualized using reflection anisotropy microscopy.