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Fluorescent HPHT nanodiamonds have disk- and rod-like shapes
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SYSNO ASEP 0569756 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Fluorescent HPHT nanodiamonds have disk- and rod-like shapes Author(s) Eldemrdash, S. (AU)
Thalassinos, G. (AU)
Alzahrani, A. (AU)
Sun, Q. (AU)
Walsh, E. (AU)
Grant, E. (AU)
Abe, H. (JP)
Greaves, T. L. (AU)
Ohshima, T. (JP)
Cígler, Petr (UOCHB-X) RID, ORCID
Matějíček, P. (CZ)
Simpson, D. A. (AU)
Greentree, A.D. (AU)
Bryant, G. (AU)
Gibson, B. C. (AU)
Reineck, P. (AU)Source Title Carbon. - : Elsevier - ISSN 0008-6223
Roč. 206, March (2023), s. 268-276Number of pages 9 s. Language eng - English Country US - United States Keywords nanodiamond ; shape ; nitrogen-vacancy center OECD category Nano-materials (production and properties) R&D Projects EF16_026/0008382 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support UOCHB-X - RVO:61388963 UT WOS 001009050600001 EID SCOPUS 85148699742 DOI 10.1016/j.carbon.2023.02.018 Annotation Fluorescent nanodiamonds (FNDs) containing nitrogen-vacancy (NV) centers can be used as nanoscale sensors for temperature and electromagnetic fields and find increasing application in many areas of science and technology from biology to quantum metrology. Decreasing the separation between the NV centers and their sensing target often enhances the measurement sensitivity. FND shape strongly affects this distance from NV centers to the particle surface and therefore properties such as brightness and fluorescence spectrum, and can limit sensor applications. Here, we demonstrate that FNDs made from high-pressure high-temperature (HPHT) diamond have predominantly disk-like shapes. Using single-particle atomic force microscopy in combination with ensemble X-ray and light scattering techniques, we show that a typical FND in the 50–150 nm size range has an aspect ratio of three i.e. is three times thinner (e.g. in z) than it is wide (e.g. in the x-y plane). This high aspect ratio of FNDs is important for many quantum sensing measurements as it will enable enhanced sensitivities compared to spherical or other isotropic particle geometries. We investigate FND shape, fluorescence properties, T1 spin relaxation time and T1 fluorescence contrast as functions of particle size and discuss the implications of FND particle shape on quantum 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/10.1016/j.carbon.2023.02.018
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