Electron spectroscopy of nanodiamond surface states

Electronic states of nanodiamond (ND) were investigated by PEELS, XPS and CKVV Auger spectra. Parallel electron energy loss spectra (PEELS) show that the electrons inside of ND particles are sp 3 hybridized but there is a surface layer containing distinct hybridized states. The CKVV Auger spectra im...

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Bibliographic Details
Published inApplied surface science Vol. 215; no. 1; pp. 169 - 177
Main Authors Belobrov, P.I, Bursill, L.A, Maslakov, K.I, Dementjev, A.P
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.06.2003
Subjects
Auger electron spectroscopy
Nanodiamond
PEELS
Surface states
XPS
PEELS
Nanodiamond
XPS
Auger electron spectroscopy
Surface states
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Summary:Electronic states of nanodiamond (ND) were investigated by PEELS, XPS and CKVV Auger spectra. Parallel electron energy loss spectra (PEELS) show that the electrons inside of ND particles are sp 3 hybridized but there is a surface layer containing distinct hybridized states. The CKVV Auger spectra imply that the HOMO of the ND surface has a shift of 2.5 eV from natural diamond levels of σ p up to the Fermi level. Hydrogen (H) treatment of natural diamond surface produces a chemical state indistinguishable from that of ND surfaces using CKVV. The ND electronic structure forms σ s 1σ p 2π 1 surface states without overlapping of π-levels. Surface electronic states, including surface plasmons, as well as phonon-related electronic states of the ND surface are also interesting and may also be important for field emission mechanisms from the nanostructured diamond surface.
ISSN:0169-4332
1873-5584
DOI:10.1016/S0169-4332(03)00287-3