Fabrication of high-density nitrogen-vacancy (NV) center-enriched diamond particles through methyl trityl amine (C20H19N) seeding

Abstract:

Diamond particles (DPs) show promise for advanced applications in bioimaging and quantum sensing due to the

presence of defect centers. This work reports a unique growth process for diamond particles composed of nitrogen-

vacancy centers (NV-DPs) using a methyl trityl amine (C20H19N) diamondoid seed, which acts as a nitrogen

source for NV creation. Growth was performed via microwave plasma-assisted chemical vapor deposition in a

CH4/H2 plasma. Tantalum plates were chosen as the substrate to facilitate the release of the NV-rich DPs after

growth. Raman spectra of NV-DPs grown at 550 °C showed a sharp, intense peak at ~1334 cm−1, while those

grown at 750 °C exhibited a broader, high intensity peak at 1336 cm−1. Photoluminescence revealed the formation

of high-density NV centers, with the highest intensity for NV-DPs grown at 750 °C and 20 Torr. Optically detected

magnetic resonance confirmed the presence of NV centers, especially for DPs grown at 750 °C. This seeding

process enables precise nitrogen incorporation into diamond crystals to generate required spin properties by

growing high-quality, well-faceted NV-DPs with customizable NV densities.

https://doi.org/10.1016/j.diamond.2024.110860

Autorzy / Authors:

S. Kunuku, M. Ficek, S. Sengottuvel, J. Ryl, M. Mrózek, A. Lewkowicz, A. Wojciechowski, Robert Bogdanowicz

Czasopismo:

Diam. Relat. Mater., 142, 110860

Rok:

2024

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