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Observation of new defect levels in nanodiamond membranes
Author(s) -
Kravets R.,
Johnston K.,
Potmesil J.,
Vorlicek V.,
Rosa J.,
Vaněček M.
Publication year - 2005
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200561918
Subject(s) - nanodiamond , photocurrent , diamond , membrane , impurity , desorption , materials science , nanocrystalline material , spectroscopy , analytical chemistry (journal) , fourier transform infrared spectroscopy , absorption (acoustics) , optoelectronics , chemistry , nanotechnology , optics , physics , composite material , adsorption , chromatography , biochemistry , organic chemistry , quantum mechanics
This paper reports on a new set of defect features in thin membrane nanodiamond. The samples were stud‐ied using Fourier transform photocurrent spectroscopy. We have observed four dominant new peaks in nanocrystalline diamond: two sharp peaks at 0.36 and 0.40 eV and broad bands at 0.27 and 0.57 eV. The first of these peaks is suggested to originate from a currently unknown bulk impurity; the other three are surface‐related and are especially prone to surface effects such as absorption/desorption over time. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)