How to Identify, Attribute, and Quantify Triplet Defects in Ensembles of Small Nanoparticles.
J Phys Chem Lett
; 11(17): 7438-7442, 2020 Sep 03.
Article
em En
| MEDLINE
| ID: mdl-32787299
ABSTRACT
Nanodiamonds containing negatively charged triplet (having an electron spin S = 1) nitrogen-vacancy (NV-) centers are an extraordinary room-temperature quantum system, whose electron spins may be polarized and read out optically even in a single nanocrystal. In this Viewpoint we promote a simple but reliable method to identify, attribute, and quantify these triplet defects in a polycrystalline sample using electron paramagnetic resonance (EPR) spectroscopy. The characterization relies on a specific "forbidden" transition ("ΔMS = 2"), which appears at about half the central magnetic field and shows a remarkably small anisotropy. In particular, we emphasize that this method is by far not limited to NV- centers in diamond but could become an important characterization tool for novel triplet defects in various types of nanoparticles.
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01-internacional
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MEDLINE
Idioma:
En
Revista:
J Phys Chem Lett
Ano de publicação:
2020
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Article
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