| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Tamura, Nobumichi
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2024Local strain inhomogeneities during electrical triggering of a metal–insulator transition revealed by X-ray microscopycitations
- 2024An Integrated Deposition and Passivation Strategy for Controlled Crystallization of 2D/3D Halide Perovskite Filmscitations
- 2022Reactive binder and aggregate interfacial zones in the mortar of Tomb of Caecilia Metella concrete, 1C BCE, Romecitations
- 2021Out-of-equilibrium processes in crystallization of organic-inorganic perovskites during spin coatingcitations
- 2020Resistive contribution in electrical-switching experiments with antiferromagnetscitations
- 2019Lattice Strain Causes Non-Radiative Losses in Halide Perovskitescitations
- 2018Local Strain Heterogeneity Influences the Optoelectronic Properties of Halide Perovskites
- 2017Residual stress determination in oxide layers at different length scales combining Raman spectroscopy and X-ray diffraction: Application to chromia-forming metallic alloyscitations
- 2016In-situ characterization of highly reversible phase transformation by synchrotron X-ray Laue microdiffractioncitations
- 2016Controlling the Temperature and Speed of the Phase Transition of VO<sub>2</sub> Microcrystalscitations
- 2015Complementary use of monochromatic and white-beam X-ray micro-diffraction for the investigation of ancient materialscitations
- 2006White beam microdiffraction experiments for the determination of the local plastic behaviour of polycrystalscitations
Places of action
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article
Controlling the Temperature and Speed of the Phase Transition of VO<sub>2</sub> Microcrystals
Abstract
We investigated the control of two important parameters of vanadium dioxide (VO2) microcrystals, the phase transition temperature and speed, by varying microcrystal width. By using the reflectivity change between insulating and metallic phases, phase transition temperature is measured by optical microscopy. As the width of square cylinder-shaped microcrystals decreases from to similar to 1 mu m, the phase transition temperature (67 degrees C for bulk) varied as much as 26.1 degrees C (19.7 degrees C) during heating (cooling). In addition, the propagation speed of phase boundary in the microcrystal, i.e., phase transition speed, is monitored at the onset of phase transition by using the high-speed resistance measurement. The phase transition speed increases from 4.6 X 10(2) to 1.7 X 10(4) mu m/s as the width decreases from similar to 50 to similar to 2 mu m. While the statistical description for a heterogeneous nucleation process explains the size dependence on phase transition temperature of VO2, the increase of effective thermal exchange process is responsible for the enhancement of phase transition speed of small VO2 microcrystals. Our findings not only enhance the understanding of VO2 intrinsic properties but also contribute to the development of innovative electronic devices.