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A near edge X-ray absorption fine structure study of oxidized single crystal and polycrystalline diamond surfaces

Shpilman, Z., Gouzman, I., Minton, T.K., Shen, L., Stacey, A., Orwa, J., Prawer, S., Cowie, B.C.C. and Hoffman, A. 2014, A near edge X-ray absorption fine structure study of oxidized single crystal and polycrystalline diamond surfaces, Diamond & related materials, vol. 45, pp. 20-27, doi: 10.1016/j.diamond.2014.03.004.

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Title A near edge X-ray absorption fine structure study of oxidized single crystal and polycrystalline diamond surfaces
Author(s) Shpilman, Z.
Gouzman, I.
Minton, T.K.
Shen, L.
Stacey, A.
Orwa, J.ORCID iD for Orwa, J. orcid.org/0000-0001-6041-6751
Prawer, S.
Cowie, B.C.C.
Hoffman, A.
Journal name Diamond & related materials
Volume number 45
Start page 20
End page 27
Total pages 8
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2014-05
ISSN 0925-9635
Keyword(s) diamond
NEXAFS
atomic oxygen
Summary The influence of oxidizing environments on single crystal diamond and polycrystalline chemical vapor deposited CVD diamond films was studied using the near edge X-ray absorption fine structure (NEXAFS) pre-edge region in both bulk and surface sensitive modes. The NEXAFS of (100) oriented single crystal diamond was measured following (i) exposure to a microwave (MW) hydrogen plasma, (ii) annealing to 1000 °C, (iii) exposure of the as annealed surface to H2O, and (iv) exposure of the as annealed surface to O2. From these measurements particular surface bonding configurations have been assigned to features in the pre-edge structure. The NEXAFS of microcrystalline CVD diamond films was studied following different oxidative treatments using (i) a thermal atomic oxygen (AO) environment, (ii) a hyperthermal (5 eV) AO source, and (iii) an RF oxygen plasma exposure. The nature of the surface layer was found to be different for differently oxidized surfaces. These treatments were carried out as part of a study of CVD diamond durability in the low Earth orbit space environment.
Language eng
DOI 10.1016/j.diamond.2014.03.004
Field of Research 020406 Surfaces and Structural Properties of Condensed Matter
Socio Economic Objective 970102 Expanding Knowledge in the Physical Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2014, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30091656

Document type: Journal Article
Collection: School of Engineering
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