Suppression of spatiotemporal chaos in the oscillatory CO oxidation on Pt(110) by focused laser light


Chemical turbulence in the oscillatory catalytic CO oxidation on Pt(110) is suppressed by means of focused laser light. The laser locally heats the platinum surface which leads to a local increase of the oscillation frequency, and to the formation of a pacemaker which emits target waves. These waves slowly entrain the medium and suppress the spatiotemporal chaos present in the absence of laser light. Our experimental results are confirmed by a detailed numerical analysis of one- and two-dimensional media using the Krischer-Eiswirth-Ertl model for CO oxidation on Pt110. Different control regimes are identified and the dispersion relation of the system is determined using the pacemaker as an externally tunable wave source.

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Divisions: College of Engineering & Physical Sciences > Systems analytics research institute (SARI)
Additional Information: © 2008 The American Physical Society
Publication ISSN: 1550-2376
Last Modified: 29 May 2024 07:11
Date Deposited: 11 Oct 2013 08:06
Full Text Link: http://link.aps ... sRevE.77.046222
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PURE Output Type: Article
Published Date: 2008-04-30
Authors: Punckt, Christian
Stich, Michael (ORCID Profile 0000-0001-8862-1044)
Beta, Carsten
Rotermund, Harm Hinrich



Version: Accepted Version

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