| 研究領域 | ハイパーマテリアル：補空間が創る新物質科学 |
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| 研究課題/領域番号 |
20H05273
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| 研究種目 |
新学術領域研究(研究領域提案型)
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| 配分区分 | 補助金 |
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| 審査区分 |
理工系
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| 研究機関 | 広島大学 |
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研究代表者 |
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| 研究期間 (年度) |
2020-04-01 – 2022-03-31
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| 研究課題ステータス |
完了 (2021年度)
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| 配分額 *注記 |
6,890千円 (直接経費: 5,300千円、間接経費: 1,590千円)
2021年度: 2,860千円 (直接経費: 2,200千円、間接経費: 660千円)
2020年度: 4,030千円 (直接経費: 3,100千円、間接経費: 930千円)
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| キーワード | Aperiodic crystals / local structure / atomic holography / x-ray holography / quasicrystal / atomic structure / local atomic environment / Hypermaterials / Atomic structure / X-ray holography |
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| 研究開始時の研究の概要 |
The project contributes to understand complex atomic arrangements as found in quasicrystals using x-ray holography. This will establish a new way to visualize the intricate structures with a direct and element-selective approach and support existing models with complementary experimental data.
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| 研究実績の概要 |
This project contributed to the understanding of complex atomic arrangements of hypermaterials using atomic-resolution X-ray holography. This method circumvents the phase problem of traditional crystallography, thus providing unique 3-dimensional structure information in a direct manner (i.e. without the need for an a priori model or data refinement). It represents new way to visualize intricate aperiodic structures with an element-selective approach and to support existing models with complementary experimental data (in addition to e.g. superspace crystallography approaches).
The experiments using large-scale synchrotron facilities were performed for several decagonal and icosahedral quasi-crystalline systems. The data could be interpreted as 3-dimensional local pair distribution functions in the range of about 2 nm around a specific element. These features represent distinct advantages in contrast to comparable methods aimed at local structure characterization like X-ray absorption spectroscopy. It could also be demonstrated that the 3D data also indicate distinct structural features, for example the connectivity between the icosahedral clusters, which are difficult to determine by traditional crystallographic and spectroscopic approaches.
Furthermore, a new detecting system was introduced, which uses a 2-dimensional area detector. With this system, a wide variety of target elements is now feasible for measurement.
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| 現在までの達成度 (段落) |
令和3年度が最終年度であるため、記入しない。
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| 今後の研究の推進方策 |
令和3年度が最終年度であるため、記入しない。
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