Repozytorium publikacji - Politechnika Gdańska

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.

Autorzy

• Srinivasu Kunuku,
• dr inż. Mateusz Ficek link otwiera się w nowej karcie ,
• Saravanan Sengottuvel,
• dr hab. inż. Jacek Ryl link otwiera się w nowej karcie ,
• dr Mariusz Mrózek,
• Aneta Lewkowicz,
• dr Adam M. Wojciechowski,
• dr hab. inż. Robert Bogdanowicz link otwiera się w nowej karcie