Argon and hydrogen plasma interactions on diamond (111) surfaces: Electronic states and structure

J. Van Der Weide, R. J. Nemanich

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Photoemission spectroscopy was used to compare the effects of a hydrogen or argon plasma on natural-type 2B diamond (111) surfaces, while the diamond was heated to 350°C. After the hydrogen plasma the surface exhibits a negative electron affinity, indicative of a hydrogen-terminated surface. In contrast, the argon plasma was found to result in a surface with a positive electron affinity of 1.0 eV, indicating the removal of hydrogen from the surface. Features characteristic of graphite were not observed. After reexposing the surface to a hydrogen plasma, the spectrum was identical to the spectrum obtained after the initial hydrogen plasma.

Original languageEnglish (US)
Pages (from-to)1878-1880
Number of pages3
JournalApplied Physics Letters
Issue number16
StatePublished - Dec 1 1993
Externally publishedYes


ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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