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

Takuya F. Segawa, Alexander I. Shames

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

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.

Original languageEnglish
Pages (from-to)7438-7442
Number of pages5
JournalJournal of Physical Chemistry Letters
Volume11
Issue number17
DOIs
StatePublished - 3 Sep 2020

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