Guiding chemical pulses through geometry: Y-junctions

Details Guiding chemical pulses through geometry: Y-junctions Guiding chemical pulses through geometry: Y-junctions

2005-12-08

arxiv.org/abs/nlin/0512019v1

Nonlinear Sciences

Pattern Formation and Solitons

submitted to Phys. Rev. E

Scientific paper

10.1103/PhysRevE.73.036219

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.

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