Nitrogen vacancy defects in single-particle nanodiamonds sense paramagnetic transition metal spin noise from nanoparticles on a transmission electron microscopy grid.

Autor: Flinn BT; School of Chemistry, University of Nottingham, University Park Nottingham NG7 2RD UK andrei.khlobystov@nottingham.ac.uk., Radu V; Optics and Photonics Group, Faculty of Engineering, University of Nottingham, University Park Nottingham NG7 2RD UK melissa.mather@nottingham.ac.uk., Fay MW; Nanoscale and Microscale Research Centre, University of Nottingham Nottingham NG7 1QL UK., Tyler AJ; Optics and Photonics Group, Faculty of Engineering, University of Nottingham, University Park Nottingham NG7 2RD UK melissa.mather@nottingham.ac.uk., Pitcairn J; School of Chemistry, University of Nottingham, University Park Nottingham NG7 2RD UK andrei.khlobystov@nottingham.ac.uk., Cliffe MJ; School of Chemistry, University of Nottingham, University Park Nottingham NG7 2RD UK andrei.khlobystov@nottingham.ac.uk., Weare BL; School of Chemistry, University of Nottingham, University Park Nottingham NG7 2RD UK andrei.khlobystov@nottingham.ac.uk., Stoppiello CT; Centre for Microscopy and Microanalysis, University of Queensland. St Lucia 4072 Australia., Mather ML; Optics and Photonics Group, Faculty of Engineering, University of Nottingham, University Park Nottingham NG7 2RD UK melissa.mather@nottingham.ac.uk., Khlobystov AN; School of Chemistry, University of Nottingham, University Park Nottingham NG7 2RD UK andrei.khlobystov@nottingham.ac.uk.; Nanoscale and Microscale Research Centre, University of Nottingham Nottingham NG7 1QL UK.
Jazyk: angličtina
Zdroj: Nanoscale advances [Nanoscale Adv] 2023 Aug 18; Vol. 5 (23), pp. 6423-6434. Date of Electronic Publication: 2023 Aug 18 (Print Publication: 2023).
DOI: 10.1039/d3na00155e
Abstrakt: Spin-active nanomaterials play a vital role in current and upcoming quantum technologies, such as spintronics, data storage and computing. To advance the design and application of these materials, methods to link size, shape, structure, and chemical composition with functional magnetic properties at the nanoscale level are needed. In this work, we combine the power of two local probes, namely, Nitrogen Vacancy (NV) spin-active defects in diamond and an electron beam, within experimental platforms used in electron microscopy. Negatively charged NVs within fluorescent nanodiamond (FND) particles are used to sense the local paramagnetic environment of Rb 0.5 Co 1.3 [Fe(CN) 6 ]·3.7H 2 O nanoparticles (NPs), a Prussian blue analogue (PBA), as a function of FND-PBA distance (order of 10 nm) and local PBA concentration. We demonstrate perturbation of NV spins by proximal electron spins of transition metals within NPs, as detected by changes in the photoluminescence (PL) of NVs. Workflows are reported and demonstrated that employ a Transmission Electron Microscope (TEM) finder grid to spatially correlate functional and structural features of the same unique NP studied using NV sensing, based on a combination of Optically Detected Magnetic Resonance (ODMR) and Magnetic Modulation (MM) of NV PL, within TEM imaging modalities. Significantly, spin-spin dipole interactions were detected between NVs in a single FND and paramagnetic metal centre spin fluctuations in NPs through a carbon film barrier of 13 nm thickness, evidenced by TEM tilt series imaging and Electron Energy-Loss Spectroscopy (EELS), opening new avenues to sense magnetic materials encapsulated in or between thin-layered nanostructures. The measurement strategies reported herein provide a pathway towards solid-state quantitative NV sensing with atomic-scale theoretical spatial resolution, critical to the development of quantum technologies, such as memory storage and molecular switching nanodevices.
Competing Interests: There are no conflicts to declare.
(This journal is © The Royal Society of Chemistry.)
Databáze: MEDLINE
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