|
Title
|
|
|
|
Nitrogen and luminescent nitrogen-vacancy defects in detonation nanodiamond
| |
|
Author
|
|
|
|
| |
|
Abstract
|
|
|
|
| An efficient method to investigate the microstructure and spatial distribution of nitrogen and nitrogen-vacancy (N-V) defects in detonation nanodiamond (DND) with primary particle sizes ranging from approximately 3 to 50 nm is presented. Detailed analysis reveals atomic nitrogen concentrations as high as 3 at% in 50% of diamond primary particles with sizes smaller than 6 nm. A non-uniform distribution of nitrogen within larger primary DND particles is also presented, indicating a preference for location within the defective central part or at twin boundaries. A photoluminescence (PL) spectrum with well-pronounced zero-phonon lines related to the N-V centers is demonstrated for the first time for electron-irradiated and annealed DND particles at continuous laser excitation. Combined Raman and PL analysis of DND crystallites dispersed on a Si substrate leads to the conclusion that the observed N-V luminescence originates from primary particles with sizes exceeding 30 nm. These findings demonstrate that by manipulation of the size/nitrogen content in DND there are prospects for mass production of nanodiamond photoemitters based on bright and stable luminescence from nitrogen-related defects. |
| |
|
Language
|
|
|
|
English
| |
|
Source (journal)
|
|
|
|
Small. - Weinheim
| |
|
Publication
|
|
|
|
Weinheim
:
2010
| |
|
ISSN
|
|
|
|
1613-6810
| |
|
Volume/pages
|
|
|
|
6
:5
(2010)
, p. 687-694
| |
|
ISI
|
|
|
|
000275972400013
| |
|
Full text (Publisher's DOI)
|
|
|
|
| |
|