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    About orientation dependence of physico-chemical properties of HPHT diamond surfaces thermally treated in H2 and D2 environments

    200797_200797a.pdf (251.4Kb)
    Access Status
    Open access
    Authors
    Manfredotti, C.
    Bonino, P.
    De La Pierre, Marco
    Vittone, E.
    Manfredotti, C.
    Date
    2010
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Manfredotti, C. and Bonino, P. and De La Pierre, M. and Vittone, E. and Manfredotti, C. 2010. About orientation dependence of physico-chemical properties of HPHT diamond surfaces thermally treated in H2 and D2 environments. Diamond & Related Materials. 19 (4): pp. 279-283.
    Source Title
    Diamond & Related Materials
    DOI
    10.1016/j.diamond.2009.11.005
    ISSN
    09259635
    School
    Department of Applied Chemistry
    Remarks

    This is the author’s version of a work that was accepted for publication in the journal Diamond & Related Materials. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in the journal Diamond & Related Materials, Vol.19, (2010). DOI: <a href="http://doi.org/10.1016/j.diamond.2009.11.005">http://doi.org/10.1016/j.diamond.2009.11.005</a>

    URI
    http://hdl.handle.net/20.500.11937/11744
    Collection
    • Curtin Research Publications
    Abstract

    Recently [1] we reported on some preliminary results on different physico-chemical properties of diamond (100), (110) and (111) surfaces hydrogenated by using molecular hydrogen only. The main conclusions were that thermal hydrogenation was as efficient as plasma one and that the creation of the conducting surface channel was activated by a larger energy on the (100) surface with respect to the other two. The reason, at least in the case of the comparison between (100) and (111) surfaces, could be either attributed to the presence of a carbon – oxygen double bond before hydrogenation in the former case [2] or to a better coverage by carbon – hydrogen bonds in the latter one. In the present work, further results on surface conductivity after hydrogenation steps carried out at different temperatures are described and discussed, in order to discriminate between purely thermal and kinetic effects. Moreover, other results are reported on diamond powders (0.25 micrometer mean size) in order to draw some qualitative and quantitative conclusions about hydrogen presence and behavior at the diamond surfaces. In order to better clarify the results, a large part of chemical measurements were performed after deuteration steps carried out using the same conditions as thermal hydrogenation.

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