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Oxidation of Au nanoparticles on HOPG using atomic oxygen

Title
Oxidation of Au nanoparticles on HOPG using atomic oxygen
Authors
Lim D.C.Lopez-Salido I.Dietsche R.Bubek M.Kim Y.D.
Ewha Authors
김영독
Issue Date
2006
Journal Title
Surface Science
ISSN
0039-6028JCR Link
Citation
Surface Science vol. 600, no. 3, pp. 507 - 513
Indexed
SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
Various Au nanostructures prepared on highly ordered pyrolytic graphite (HOPG) were oxidized using atomic oxygen under ultrahigh-vacuum conditions, and the oxygen species formed in the Au nanostructures were characterized using X-ray photoelectron spectroscopy (XPS). For an Au thin film, only a single oxygen species could be identified in the O 1s spectrum, which can be attributed to Au-oxide. For Au nanoparticles smaller than ∼10 nm, in contrast, two different oxygen species were detected, which are suggested to be Au-oxide and subsurface oxygen (or dissolved oxygen), respectively. CO titration experiments confirm the formation of different oxygen species depending on the particle size. © 2005 Elsevier B.V. All rights reserved.
DOI
10.1016/j.susc.2005.10.064
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
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