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Unprecedented switching endurance affords for high-resolution surface temperature mapping using a spin-crossover film

Abstract : Temperature measurement at the nanoscale is of paramount importance in the fields of nanoscience and nanotechnology, and calls for the development of versatile, high-resolution thermometry techniques. Here, the working principle and quantitative performance of a cost-effective nanothermometer are experimentally demonstrated, using a molecular spin-crossover thin film as a surface temperature sensor, probed optically. We evidence highly reliable thermometric performance (diffraction-limited sub-µm spatial, µs temporal and 1 °C thermal resolution), which stems to a large extent from the unprecedented quality of the vacuum-deposited thin films of the molecular complex [Fe(HB(1,2,4-triazol-1-yl)3)2] used in this work, in terms of fabrication and switching endurance (>107 thermal cycles in ambient air). As such, our results not only afford for a fully-fledged nanothermometry method, but set also a forthcoming stage in spin-crossover research, which has awaited, since the visionary ideas of Olivier Kahn in the 90’s, a real-world, technological application.
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https://hal.archives-ouvertes.fr/hal-02948898
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Submitted on : Thursday, November 19, 2020 - 11:11:34 AM
Last modification on : Friday, November 20, 2020 - 9:18:03 AM

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Nature Communications, 2020, 1...
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Karl Ridier, Alin-Ciprian Bas, Yuteng Zhang, Lucie Routaboul, Lionel Salmon, et al.. Unprecedented switching endurance affords for high-resolution surface temperature mapping using a spin-crossover film. Nature Communications, Nature Publishing Group, 2020, 11 (1), pp.3611. ⟨10.1038/s41467-020-17362-7⟩. ⟨hal-02948898⟩

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