Title
Local boron environment in B-doped nanocrystalline diamond filmsLocal boron environment in B-doped nanocrystalline diamond films
Author
Faculty/Department
Faculty of Sciences. Physics
Research group
Electron microscopy for materials research (EMAT)
Publication type
article
Publication
Cambridge,
Subject
Physics
Chemistry
Engineering sciences. Technology
Source (journal)
Nanoscale / Royal Society of Chemistry. - Cambridge
Volume/pages
4(2012):19, p. 5960-5964
ISSN
2040-3364
ISI
000308705900026
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Thin films of heavily B-doped nanocrystalline diamond (B:NCD) have been investigated by a combination of high resolution annular dark field scanning transmission electron microscopy and spatially resolved electron energy-loss spectroscopy performed on a state-of-the-art aberration corrected instrument to determine the B concentration, distribution and the local B environment. Concentrations of [similar]1 to 3 at.% of boron are found to be embedded within individual grains. Even though most NCD grains are surrounded by a thin amorphous shell, elemental mapping of the B and C signal shows no preferential embedding of B in these amorphous shells or in grain boundaries between the NCD grains, in contrast with earlier work on more macroscopic superconducting polycrystalline B-doped diamond films. Detailed inspection of the fine structure of the boron K-edge and comparison with density functional theory calculated fine structure energy-loss near-edge structure signatures confirms that the B atoms present in the diamond grains are substitutional atoms embedded tetrahedrally into the diamond lattice.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/637850/e09ba47f.pdf
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