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

Christian Punckt, Michael Stich, Carsten Beta, Harm Hinrich Rotermund

Research output: Contribution to journalArticle

Abstract

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.
Original languageEnglish
Article number046222
Number of pages12
JournalPhysical Review E
Volume77
Issue number4
DOIs
Publication statusPublished - 30 Apr 2008

Bibliographical note

© 2008 The American Physical Society

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