Wave Initiation through Spatiotemporally Controllable Perturbations

J. Wolff, A. G. Papathanasiou, H. H. Rotermund, G. Ertl, M. A. Katsoulakis, X. Li, and I. G. Kevrekidis
Phys. Rev. Lett. 90, 148301 – Published 9 April 2003

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.

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  • Received 13 November 2002

DOI:https://doi.org/10.1103/PhysRevLett.90.148301

©2003 American Physical Society

Authors & Affiliations

J. Wolff, A. G. Papathanasiou, H. H. Rotermund*, and G. Ertl

  • Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany

M. A. Katsoulakis

  • Department of Mathematics and Statistics, University of Massachusetts, Amherst, Massachusetts, 01003

X. Li and I. G. Kevrekidis

  • Department of Chemical Engineering, Princeton University, Princeton, New Jersey, 08544

  • *Corresponding author. Email address: rotermun@fhi-berlin.mpg.de

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Issue

Vol. 90, Iss. 14 — 11 April 2003

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