Comparative study of the alloying effect on the initial oxidation of Cu-Au(100) and Cu-Pt(100)

Journal Article · Mon Mar 24 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4870085· OSTI ID:22258582

Luo, Langli; Zhou, Guangwen ^[1]; Kang, Yihong ^[2]; Yang, Judith C. ^[3]; Su, Dong; Stach, Eric A. ^[4]

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1. Department of Mechanical Engineering and Multidisciplinary Program in Materials Science and Engineering, State University of New York, Binghamton, New York 13902 (United States)
2. Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15261 (United States)
3. Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261 (United States)
4. Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973 (United States)

Using in situ transmission electron microscopy, we show that the oxidation of the Cu-Au(100) results in the formation of Cu{sub 2}O islands that deeply embed into the Cu-Au substrate while the oxidation of the Cu-Pt(100) leads to the formation of Cu{sub 2}O islands that highly protrude above the Cu-Pt substrate. Their difference is attributed to the different mobilities of Pt and Au in the Cu base alloys for which the sluggish mobility of Pt in Cu results in trapped Pt atoms at the oxide/alloy interface while the faster mobility of Au in Cu leads to enhanced rehomogenization of the alloy composition.

• OSTI ID: 22258582
• Journal Information: Applied Physics Letters, Vol. 104, Issue 12; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALLOYS
COPPER OXIDES
GOLD
MOBILITY
OXIDATION
PLATINUM
SUBSTRATES
TRANSMISSION ELECTRON MICROSCOPY