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- W2896051921 abstract "While nucleation-limited transformation mechanisms are widely implicated in unstrained, undoped $mathrm{V}{mathrm{O}}_{2}$ nanoparticles, a direct link between nucleation barriers and hysteresis widths has not yet been established. Here, we investigate microscopic transformation of structural domains optically in hydrothermally grown $mathrm{V}{mathrm{O}}_{2}$ particles ensuremath{sim}0.5--46 ensuremath{mu}m in length, which are not elastically clamped to the substrate. We observe abrupt and generally complete transformation in individual particles, consistent with a nucleation-limited transformation mechanism. The forward and reverse transformation temperatures are not correlated, suggesting a range of potency of nucleation sites for both forward and reverse transformation in undoped particles, resulting in a hysteresis of 2.9--46.3 ifmmode^circelsetextdegreefi{}C. Thus, the macroscopic hysteresis width in bulk $mathrm{V}{mathrm{O}}_{2}$ powders and dispersed particulate films is primarily attributable to a distribution of critical nucleation temperatures between different particles. These findings suggest that as $mathrm{V}{mathrm{O}}_{2}$ volume elements are scaled down for microelectronic applications, manipulation of nucleation sites via defect engineering may be required to control the degree of the $mathrm{V}{mathrm{O}}_{2}$ element reversibility." @default.
- W2896051921 created "2018-10-26" @default.
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- W2896051921 date "2018-10-09" @default.
- W2896051921 modified "2023-10-18" @default.
- W2896051921 title "Nucleation-controlled hysteresis in unstrained hydrothermal <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi mathvariant=normal>V</mml:mi><mml:msub><mml:mi mathvariant=normal>O</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math> particles" @default.
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- W2896051921 doi "https://doi.org/10.1103/physrevmaterials.2.103402" @default.
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