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- Elin M. Larsson
- Chemical Physics Group, Department of Applied Physics, Chalmers University of Technology, SE-41296 Gothenburg, Sweden.
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- Christoph Langhammer
- Chemical Physics Group, Department of Applied Physics, Chalmers University of Technology, SE-41296 Gothenburg, Sweden.
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- Igor Zorić
- Chemical Physics Group, Department of Applied Physics, Chalmers University of Technology, SE-41296 Gothenburg, Sweden.
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- Bengt Kasemo
- Chemical Physics Group, Department of Applied Physics, Chalmers University of Technology, SE-41296 Gothenburg, Sweden.
書誌事項
- 公開日
- 2009-11-20
- DOI
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- 10.1126/science.1176593
- 公開者
- American Association for the Advancement of Science (AAAS)
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説明
<jats:title>Plasmonic Probing of Catalysis</jats:title> <jats:p> An understanding of catalytic reactions on surfaces, such as those used in industrial processes, often requires some measure of reactant concentration on the surface. Often this is expressed as the surface coverage of metal particles that are dispersed on oxide supports. Although optical probes of surface coverage would be convenient, they usually lack sufficient sensitivity to detect the small number of molecules on the surface. <jats:bold> Larsson <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" page="1091" related-article-type="in-this-issue" vol="326" xlink:href="10.1126/science.1176593">1091</jats:related-article> , published online 22 October) have used shifts in plasmon resonances to measure surface coverages. They grow oxide coatings, decorated with metal catalyst particles, on a nanoscale gold disk, and find that these model catalysts are within the region of plasmon sensitivity. Reactions such as CO oxidation on platinum can be followed for different ratios of reactant gases with a sensitivity of 0.1 monolayer of surface coverage. </jats:p>
収録刊行物
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- Science
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Science 326 (5956), 1091-1094, 2009-11-20
American Association for the Advancement of Science (AAAS)