Back to Search
Start Over
Creation of high density ensembles of nitrogen-vacancy centers in nitrogen-rich type Ib nanodiamonds.
- Source :
-
Nanotechnology [Nanotechnology] 2013 Aug 09; Vol. 24 (31), pp. 315702. Date of Electronic Publication: 2013 Jul 15. - Publication Year :
- 2013
-
Abstract
- This work explores the possibility of increasing the density of negatively charged nitrogen-vacancy centers ([NV(-)]) in nanodiamonds using nitrogen-rich type Ib diamond powders as the starting material. The nanodiamonds (10-100 nm in diameter) were prepared by ball milling of microdiamonds, in which the density of neutral and atomically dispersed nitrogen atoms ([N(0)]) was measured by diffuse reflectance infrared Fourier transform spectroscopy. A systematic measurement of the fluorescence intensities and lifetimes of the crushed monocrystalline diamonds as a function of [N(0)] indicated that [NV(-)] increases nearly linearly with [N(0)] at 100-200 ppm. The trend, however, failed to continue for nanodiamonds with higher [N(0)] (up to 390 ppm) but poorer crystallinity. We attribute the result to a combined effect of fluorescence quenching as well as the lower conversion efficiency of vacancies to NV(-) due to the presence of more impurities and defects in these as-grown diamond crystallites. The principles and practice of fabricating brighter and smaller fluorescent nanodiamonds are discussed.
Details
- Language :
- English
- ISSN :
- 1361-6528
- Volume :
- 24
- Issue :
- 31
- Database :
- MEDLINE
- Journal :
- Nanotechnology
- Publication Type :
- Academic Journal
- Accession number :
- 23857995
- Full Text :
- https://doi.org/10.1088/0957-4484/24/31/315702