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Long Spin Relaxation Times in CVD-Grown Nanodiamonds
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SYSNO ASEP 0576914 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Long Spin Relaxation Times in CVD-Grown Nanodiamonds Author(s) Prooth, J. (BE)
Petrov, M. (BE)
Shmakova, A. (BE)
Gulka, Michal (UOCHB-X) ORCID
Cígler, Petr (UOCHB-X) RID, ORCID
D´Haen, J. (BE)
Boyen, H. G. (BE)
Nesladek, M. (BE)Article number 2300004 Source Title Advanced Quantum Technologies. - New York : Wiley
Roč. 6, č. 12 (2023)Number of pages 11 s. Language eng - English Country US - United States Keywords chemical vapor deposition ; fluorescent nanodiamonds ; nitrogen-vacancy (NV) spin relaxometry ; quantum sensing OECD category Condensed matter physics (including formerly solid state physics, supercond.) R&D Projects EF16_026/0008382 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA23-04876S GA ČR - Czech Science Foundation (CSF) Method of publishing Open access Institutional support UOCHB-X - RVO:61388963 UT WOS 001086207300001 EID SCOPUS 85173801975 DOI 10.1002/qute.202300004 Annotation Currently, the primary applications of fluorescent nanodiamonds (FNDs) are in the area of biosensing, by using photoluminescence or spin properties of color centres, mainly represented by the nitrogen vacancy (NV) point defect. The sensitivity of NV-FNDs to external fields is, however, limited by crystallographic defects, which influence their key quantum state characteristics the spin longitudinal (T1) and spin transversal (T2) relaxation and coherence times, respectively. This paper reports on utilizing an advanced FND growth technique consisting of heterogeneous nucleation on pre-engineered sites to create FNDs averaging around 60 nm in size, with mean longitudinal coherence times of 800 (Formula presented.) s and a maximum over 1.8 ms, close to bulk theoretical values. This is a major, nearly ten-fold improvement over commercially available nanodiamonds for the same size range of 50 to 150 nm. Heavy-N doped nanodiamond shells, important for sensing events in nm proximity to the diamond surface, are fabricated and discussed in terms of re-nucleation and twinning on {111} crystal facets. The scalability issues are discussed in order to enable the production of FND volumes matching the needs of sensing applications. Workplace Institute of Organic Chemistry and Biochemistry Contact asep@uochb.cas.cz ; Kateřina Šperková, Tel.: 232 002 584 ; Jana Procházková, Tel.: 220 183 418 Year of Publishing 2024 Electronic address https://doi.org/10.1002/qute.202300004
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