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Journal Article

Wave initiation through spatiotemporally controllable perturbations

MPS-Authors
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Wolff,  Janpeter
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Papathanasiou,  Athanasios G.
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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Ertl,  Gerhard
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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e148301.pdf
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Citation

Wolff, J., Papathanasiou, A. G., Rotermund, H. H., Ertl, G., Katsoulakis, M. A., Li, X., et al. (2003). Wave initiation through spatiotemporally controllable perturbations. Physical Review Letters, 90(14): 148301. doi:10.1103/PhysRevLett.90.148301.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0011-1080-8
Abstract
We study the initiation of pulses and fronts in a two-dimensional catalytic reaction–diffusion system: CO oxidation on Pt(110). Using a computer-controlled mobile focused laser beam, we impart various patterns (in space and time) of localized temperature "kicks" to the surface. We explore, and also rationalize through modeling, the cooperativity of such individually subcritical perturbations in both the excitable and the bistable regime.