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  Spiral waves in a surface reaction: Model calculations

Bär, M., Gottschalk, N., Eiswirth, M., & Ertl, G. (1994). Spiral waves in a surface reaction: Model calculations. The Journal of Chemical Physics, 100(2), 1202-1214. doi:10.1063/1.466650.

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1.466650.pdf (Publisher version), 2MB
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1994
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 Creators:
Bär, Markus1, Author           
Gottschalk, Niels2, Author           
Eiswirth, Markus1, Author           
Ertl, Gerhard1, Author           
Affiliations:
1Physical Chemistry, Fritz Haber Institute, Max Planck Society, ou_634546              
2Fritz Haber Institute, Max Planck Society, ou_24021              

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 Abstract: A systematic study of spiral waves in a realistic reaction‐diffusion model describing the isothermal CO oxidation on Pt(110) is carried out. Spirals exist under oscillatory, excitable, and bistable (doubly metastable) conditions. In the excitable region, two separate meandering transitions occur, both when the time scales become strongly different and when they become comparable. By the assumption of surface defects of the order of 10 μm, to which the spirals can be pinned, the continuous distribution of wavelengths observed experimentally can be explained. An external periodic perturbation generally causes a meandering motion of a free spiral, while a straight drift results, if the period of the perturbation divided by the rotation period is a natural number.

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Language(s): eng - English
 Dates: 1993-09-201993-10-081994-01-15
 Publication Status: Issued
 Pages: 13
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1063/1.466650
 Degree: -

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Title: The Journal of Chemical Physics
  Abbreviation : J. Chem. Phys.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Institute of Physics
Pages: 13 Volume / Issue: 100 (2) Sequence Number: - Start / End Page: 1202 - 1214 Identifier: ISSN: 0021-9606
CoNE: https://pure.mpg.de/cone/journals/resource/954922836226