Structure and properties of densified silica glass : characterizing the order within disorder
| العنوان: | Structure and properties of densified silica glass : characterizing the order within disorder |
|---|---|
| المؤلفون: | Matthew B. Stone, Yasuhiro Fujii, Ippei Obayashi, Akihiko Hirata, Yohei Onodera, Shinji Kohara, Alex C. Hannon, Philip S. Salmon, Alexander I. Kolesnikov, Seiji Kojima, Annalisa Polidori, Anita Zeidler, Koji Ohara, Hiroyuki Inoue, Jaakko Akola, Marshall T. McDonnell, Suguru Kitani, Osami Sakata, Atsunobu Masuno, Norimasa Nishiyama, Tatsuya Mori, Yasuaki Hiraoka, Henry E. Fischer, Shuta Tahara, Takenobu Nakamura, Matthew G. Tucker, Hitoshi Kawaji, Takashi Taniguchi, Motoki Shiga |
| المساهمون: | Tampere University, Physics |
| المصدر: | NPG Asia Materials 'NPG Asia Materials ', vol: 12, pages: 85-1-85-16 (2020) |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Solid-state chemistry, Materials science, Glasses, Neutron diffraction, 02 engineering and technology, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Heat capacity, Condensed Matter::Disordered Systems and Neural Networks, 114 Physical sciences, Inelastic neutron scattering, Amorphous solid, Structural complexity, Applied physics, Chemical physics, Modeling and Simulation, 216 Materials engineering, 0103 physical sciences, General Materials Science, Symmetry breaking, 010306 general physics, 0210 nano-technology, Material properties |
| الوصف: | The broken symmetry in the atomic-scale ordering of glassy versus crystalline solids leads to a daunting challenge to provide suitable metrics for describing the order within disorder, especially on length scales beyond the nearest neighbor that are characterized by rich structural complexity. Here, we address this challenge for silica, a canonical network-forming glass, by using hot versus cold compression to (i) systematically increase the structural ordering after densification and (ii) prepare two glasses with the same high-density but contrasting structures. The structure was measured by high-energy X-ray and neutron diffraction, and atomistic models were generated that reproduce the experimental results. The vibrational and thermodynamic properties of the glasses were probed by using inelastic neutron scattering and calorimetry, respectively. Traditional measures of amorphous structures show relatively subtle changes upon compacting the glass. The method of persistent homology identifies, however, distinct features in the network topology that change as the initially open structure of the glass is collapsed. The results for the same high-density glasses show that the nature of structural disorder does impact the heat capacity and boson peak in the low-frequency dynamical spectra. Densification is discussed in terms of the loss of locally favored tetrahedral structures comprising oxygen-decorated SiSi4 tetrahedra. 世界一構造秩序のあるガラスの合成と構造解析に成功 --ガラスの一見無秩序な構造の中に潜む秩序を抽出--. 京都大学プレスリリース. 2021-12-25. |
| وصف الملف: | fulltext; application/pdf |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8f729dfacad5efd1f3a0d96b4f6bb591 https://trepo.tuni.fi/handle/10024/128101 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....8f729dfacad5efd1f3a0d96b4f6bb591 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |