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. 2020 Aug 28;8(5):nwaa194. doi: 10.1093/nsr/nwaa194

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© The Author(s) 2020. Published by Oxford University Press on behalf of China Science Publishing & Media Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 1. — Design of a hybrid nanothermometer composed of a single magnetic copper-nickel alloy nanoparticle and a single nitrogen-vacancy (NV) center in a diamond nanopillar. (a) Simulation of the magnetization M of a copper-nickel alloy nanoparticle as a function of temperature under a magnetic field of 100 Gauss. The inset illustrates the configuration of the hybrid nanothermometer. (b) Atomic force microscopy (AFM) image of the copper-nickel alloy magnetic nanoparticle (MNP) and the diamond nanopillar before the nanomanipulation (upper graph) and after the nanomanipulation (lower graph), and the corresponding optically detected magnetic resonance (ODMR) spectra of the single NV center before and after nanomanipulation (dots being measurement data and lines the double Lorentzian peak fitting). Scale bar is 1 . (c) ODMR spectra of the hybrid nanothermometer at different environmental temperatures (from 298 K to 324 K from bottom to top). (d) ODMR frequency shifts in the heating (red) and cooling (blue) processes. The inset shows the temperature susceptibility of the hybrid nanothermometer, which has the maximum (at 311 K).

Inline graphic — Design of a hybrid nanothermometer composed of a single magnetic copper-nickel alloy nanoparticle and a single nitrogen-vacancy (NV) center in a diamond nanopillar. (a) Simulation of the magnetization M of a copper-nickel alloy nanoparticle as a function of temperature under a magnetic field of 100 Gauss. The inset illustrates the configuration of the hybrid nanothermometer. (b) Atomic force microscopy (AFM) image of the copper-nickel alloy magnetic nanoparticle (MNP) and the diamond nanopillar before the nanomanipulation (upper graph) and after the nanomanipulation (lower graph), and the corresponding optically detected magnetic resonance (ODMR) spectra of the single NV center before and after nanomanipulation (dots being measurement data and lines the double Lorentzian peak fitting). Scale bar is 1 . (c) ODMR spectra of the hybrid nanothermometer at different environmental temperatures (from 298 K to 324 K from bottom to top). (d) ODMR frequency shifts in the heating (red) and cooling (blue) processes. The inset shows the temperature susceptibility of the hybrid nanothermometer, which has the maximum (at 311 K).