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

Nature Communications
Karl RidierAzzedine Bousseksou

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.

References

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Citations

Aug 28, 2020·Journal of the American Chemical Society·Shasha LiuWei Wang
Sep 3, 2021·Journal of the American Chemical Society·Miguel Gakiya-TeruyaMichael Shatruk

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Methods Mentioned

BETA
scanning
transmission electron microscopy
electron-beam
chips
chip
AFM
quartz
atomic force microscopy

Software Mentioned

COMSOL

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