Surface contributions to the XPS spectra of nanostructured NiO deposited on HOPG

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Bibliographic Details
Title: Surface contributions to the XPS spectra of nanostructured NiO deposited on HOPG
Authors: Preda, I.1, Mossanek, R.J.O.2, Abbate, M.2, Alvarez, L.3, Méndez, J.3, Gutiérrez, A.1, Soriano, L.1 l.soriano@uam.es
Source: Surface Science. Sep2012, Vol. 606 Issue 17/18, p1426-1430. 5p.
Subjects: Nanostructured materials, Nickel oxides, Graphite, Surfaces (Technology), X-ray photoelectron spectroscopy, Atomic force microscopy, Scientific observation
Abstract: Abstract: In this work we present an in situ X-ray photoelectron spectroscopy (XPS) study of the growth of NiO on highly ordered pyrolitic graphite (HOPG). The XPS spectra were measured as a function of the equivalent NiO coverage. Also, ex-situ atomic force microscopy (AFM) images were taken for some of these stages in order to follow the morphology of the NiO deposits. For low coverages the lineshapes of the Ni 2p spectra differ strongly from those of bulk NiO. This has been related to the large surface contribution. The O 1s XPS spectra also show a surface related structure which follows the same trend observed in the Ni 2p spectra. [Copyright &y& Elsevier]
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Database: Engineering Source
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Abstract:Abstract: In this work we present an in situ X-ray photoelectron spectroscopy (XPS) study of the growth of NiO on highly ordered pyrolitic graphite (HOPG). The XPS spectra were measured as a function of the equivalent NiO coverage. Also, ex-situ atomic force microscopy (AFM) images were taken for some of these stages in order to follow the morphology of the NiO deposits. For low coverages the lineshapes of the Ni 2p spectra differ strongly from those of bulk NiO. This has been related to the large surface contribution. The O 1s XPS spectra also show a surface related structure which follows the same trend observed in the Ni 2p spectra. [Copyright &y& Elsevier]
ISSN:00396028
DOI:10.1016/j.susc.2012.05.005