How to Identify, Attribute, and Quantify Triplet Defects in Ensembles of Small Nanoparticles

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...

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Bibliographic Details
Published in:The journal of physical chemistry letters 2020-09, Vol.11 (17), p.7438-7442
Main Authors: Segawa, Takuya F, Shames, Alexander I
Format: Article
Language:English
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Summary: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 (“ΔM S = 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.
ISSN:1948-7185
1948-7185
DOI:10.1021/acs.jpclett.0c01922