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Toward Controlled Modification of Nanoporous Gold: A Detailed Surface Science Study on Cleaning and Oxidation
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Surface and Interface Science. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Surface and Interface Science. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
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2012 (English)In: The Journal of Physical Chemistry C, ISSN 1932-7447, E-ISSN 1932-7455, Vol. 116, no 7, 4564-4571 p.Article in journal (Refereed) Published
Abstract [en]

Nanostructured metals and especially unsupported nanoporous gold (np-Au) have attracted considerable attention in a variety of fields because of their special surface chemical properties. For applications in catalysis and sensorics, the oxidation, of the metal and the availability of oxygen at the very surface are crucial and also are capable of altering structural properties. In this article, we will discuss the state of the np-Au surface after annealing in vacuum. We shed light on the nature of Au-oxide obtained after cleaning the surface from carbon impurities with atomic oxygen provided by ozone decomposition, and we consider the effect of this procedure on silver residues. The results provide new insight into possible oxide species at the np-Au surface and represent a vital step toward controlled modification of the np-Au surface in the future.

Place, publisher, year, edition, pages
2012. Vol. 116, no 7, 4564-4571 p.
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Physical Sciences
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URN: urn:nbn:se:uu:diva-172049DOI: 10.1021/jp207638tISI: 000301156500027OAI: oai:DiVA.org:uu-172049DiVA: diva2:513365
Available from: 2012-04-02 Created: 2012-04-01 Last updated: 2017-12-07

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Schaefer, AndreasRagazzon, DavideSandell, Anders

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