Evidence of polyamorphic transitions during densified SiO2 glass annealing
| العنوان: | Evidence of polyamorphic transitions during densified SiO2 glass annealing |
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| المؤلفون: | Valérie Martinez, C. Martinet, Dominique de Ligny, Antoine Cornet |
| المساهمون: | Spectroscopies optiques des matériaux verres, amorphes et à nanoparticules (SOPRANO), Institut Lumière Matière [Villeurbanne] (ILM), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Friedrich-Alexander Universität Erlangen-Nürnberg (FAU) |
| المصدر: | Journal of Chemical Physics Journal of Chemical Physics, American Institute of Physics, 2019, 151 (16), pp.164502. ⟨10.1063/1.5121534⟩ |
| بيانات النشر: | HAL CCSD, 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | Diffraction, [PHYS]Physics [physics], Range (particle radiation), Materials science, 010304 chemical physics, Condensed matter physics, Scattering, General Physics and Astronomy, Energy landscape, 010402 general chemistry, 01 natural sciences, Condensed Matter::Disordered Systems and Neural Networks, 0104 chemical sciences, Annealing (glass), Amorphous solid, symbols.namesake, [SPI]Engineering Sciences [physics], 0103 physical sciences, symbols, [CHIM]Chemical Sciences, Physical and Theoretical Chemistry, Raman spectroscopy, Coherence (physics) |
| الوصف: | International audience; In situ X-ray scattering monitoring is carried out during temperature annealing on different densified SiO2 glasses. Density fluctuations and intermediate range coherence from X-ray scattering (small-angle X-ray scattering) and diffraction (wide angle X-ray scattering) evidence a maximum in their evolution at the same relaxation time. These extrema confirm the existence of an intermediate transitory disordered state between the two more ordered high and low density amorphous states. We propose that the existence of this transitory state confirms the existence of two mega basins in the energy landscape and therefore an amorphous-amorphous transition. Including older Raman results, we show that this intermediate disorder state implies similar mechanisms at all length scales from a few angstroms to 5 nm. |
| اللغة: | English |
| تدمد: | 0021-9606 1089-7690 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::92d5cdde2d5c6c98b9865068c62f4c13 https://hal.archives-ouvertes.fr/hal-02417220 |
| رقم الأكسشن: | edsair.doi.dedup.....92d5cdde2d5c6c98b9865068c62f4c13 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Scitation. | تدمد: | 00219606 10897690 |
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