Photoluminescence of single colour defects in 50 nm diamond nanocrystals
arXiv:cond-mat/0509512 · doi:10.1016/j.physb.2005.12.232
Abstract
We used optical confocal microscopy to study optical properties of diamond 50 nm nanocrystals first irradiated with an electron beam, then dispersed as a colloidal solution and finally deposited on a silica slide. At room temperature, under CW laser excitation at a wavelength of 514.5 nm we observed perfectly photostable single Nitrogen-Vacancy (NV) colour defects embedded in the nanocrystals. From the zero-phonon line around 575 nm in the spectrum of emitted light, we infer a neutral NV0 type of defect. Such nanoparticle with intrinsic fluorescence are highly promising for applications in biology where long-term emitting fluorescent bio-compatible nanoprobes are still missing.
arXiv commentproceedings of ICDS 23 conference (23rd International Conference on Defects in Semiconductors, July 24 - July 29, 2005, Awaji Island, Hyogo, Japan); to appear in "Physica B"
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- Photoluminescent diamond nanoparticles for cell labeling: study of the uptake mechanism in mammalian cells
- Surface-induced charge state conversion of nitrogen-vacancy defects in nanodiamonds
- Diamond for biosensor applications
- Single nitrogen vacancy centers in chemical vapor deposited diamond nanocrystals
- Prediction and measurement of the size-dependent stability of fluorescence in diamond over the entire nanoscale
- Photophysics of single nitrogen-vacancy centers in diamond nanocrystals
- Engineered arrays of NV color centers in diamond based on implantation of CN- molecules through nanoapertures
- Comparison of the photoluminescence properties of semiconductor quantum dots and non-blinking diamond nanoparticles. Observation of the diffusion of diamond nanoparticles in living cells
- Diamond nanoparticles as photoluminescent nanoprobes for biology and near-field optics
- Leakage radiation microscopy of surface plasmons launched by a nanodiamond-based tip
- Robust quantification of the diamond nitrogen-vacancy center charge state via photoluminescence spectroscopy