![nitrogen xps peak position nitrogen xps peak position](https://ars.els-cdn.com/content/image/1-s2.0-S0008622320302116-gr6.jpg)
Ī DND is synthesized from the pyrolysis products of the explosives’ energy-releasing components during detonation. This limits the application, for example, of DNDs (size < 6 nm) in magnetic sensing applications and other local probings at the nanoscale.
![nitrogen xps peak position nitrogen xps peak position](https://www.researchgate.net/profile/Rino-Choi-2/publication/37255186/figure/fig5/AS:669374784491530@1536602793119/XPS-shows-that-nitrogen-peak-appears-only-in-nitridation-sample.png)
However, DNDs typically contain a high concentration of imperfections. Nanodiamonds can be produced during the detonation of explosives, giving so-called detonation nanodiamonds (DNDs). They can also be used as point-like probes for measurement of the Johnson noise in metals. Encapsulation of nanodiamond crystallites in biocompatible translucent shells is especially promising for their application in biological environments. The fluorescence properties of the nanodiamonds combined with their small sizes (< 40 nm) enable their use in biomedical applications including the intra-cell contrast imaging of submicron organelles and nanometre-scale thermometry in embryos. The colour centres possess triplet spin properties that can be detected by optically detectable magnetic resonance (ODMR). The wide range of fields of application arises from the unprecedented unique quantum properties of the NV − colour centres occurring at room temperature. Specific applications currently include magnetic sensing, bioimaging, and telecommunications and information processing, including the use of nanoresonator-coupled photon sources. This effect is a unique quantum feature of NV − centres, which cannot be observed for other visible domain light-emitting colour centres in a diamond lattice.įluorescent nanodiamonds (NDs) containing nitrogen-vacancy (NV −) centres are novel nanomaterials that open the way to innovative applications. We have further observed an abrupt drop in the PL intensity when mixing and anti-crossing of the ground and excited states spin levels in NV − occurs under an applied external magnetic field. Subwavelength emitters consisting of NV − with sizes a few times smaller than the diffraction-limited spot are clearly distinguished. Confocal fluorescence microscopy enables detection of the red photoluminescence (PL) of the NV − colour centres in nanoscale DND aggregates formed from the 5-nm nanoparticles. This line is related with “forbidden” ∆ m s = 2 transitions between the Zeeman levels of a NV − centre’s ground triplet state. The concentration was estimated from the electron paramagnetic resonance as determined from the integrated intensity of the g = 4.27 line. This value is impressive for nanodiamonds of size < 10 nm with intentionally created NV − centres. The content of nitrogen-vacancy (NV −) colour centres in the nanodiamonds (DNDs) produced during the detonation of nitrogen-containing explosives was found to be 1.1 ± 0.3 ppm.