Nanoscale duplex oxide growth during early stages of oxidation of Cu-Ni(100)

Journal Article · Thu Oct 01 00:00:00 EDT 2009 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.80.134106· OSTI ID:21287076

Guangwen, Zhou ^[1]; Fong, Dillon D; Fuoss, Paul H; Baldo, Peter M; Thompson, Loren J; Eastman, Jeffrey A ^[2]; Liang, Wang ^[3]

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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. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
3. Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States)

A combination of real-time in situ synchrotron x-ray diffraction and ex situ transmission electron microscopy is utilized to investigate the early stages of oxidation of Cu-Ni(100). Sequential formation of NiO and Cu{sub 2}O oxides was observed by increasing oxygen partial pressure, and the Cu{sub 2}O phase was identified to form preferentially on top of NiO nanoislands. The origin of this unexpected phenomenon is attributed to localized enrichment of Cu atoms accompanied with NiO growth, which thermodynamically drives the nanoscale Cu{sub 2}O/NiO duplex oxide growth.

• OSTI ID: 21287076
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 80, Issue 13; Other Information: DOI: 10.1103/PhysRevB.80.134106; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ATOMS
COPPER
COPPER COMPLEXES
COPPER OXIDES
CRYSTAL GROWTH
NANOSTRUCTURES
NICKEL
NICKEL COMPLEXES
NICKEL OXIDES
OXIDATION
OXYGEN
PARTIAL PRESSURE
SYNCHROTRONS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION