Atomic-Scale Heterogeneity of Hydrogen in Metal Hydrides Revealed by Electron Ptychography
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arXiv
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| Auteurs principaux: | , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866915408920969216 |
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| author | Li, Pengcheng Pua, Chenglin Dong, Zehao Su, Zhengxiong Liu, Tao Cai, Chao Shen, Huahai Gu, Lin Chen, Zhen |
| author_facet | Li, Pengcheng Pua, Chenglin Dong, Zehao Su, Zhengxiong Liu, Tao Cai, Chao Shen, Huahai Gu, Lin Chen, Zhen |
| contents | Hydrogen plays critical roles in materials science, particularly for advancing technologies in hydrogen storage and phase manipulation, while also posing challenges like hydrogen embrittlement. Understanding its behavior, vital for improving material properties, requires precise determination of atomic-scale distribution-a persistent challenge due to hydrogen's weak electron scattering and high mobility, as well as the limitations of conventional transmission electron microscopy. We demonstrate that multislice electron ptychography (MEP) overcomes these constraints through three key advances: exceptional sensitivity for hydrogen occupancy, three-dimensional quantification, and picometer-level precision in atomic positioning. Experimentally, MEP resolves heterogeneous hydrogen distributions and quantifies hydrogen-induced lattice displacements with picometer precision in multi-principal-element alloy hydrides. This work demonstrates MEP as a transformative method for directly probing hydrogen atoms in solids, unlocking fundamental understanding of hydrogen's impact on material properties. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_18906 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Atomic-Scale Heterogeneity of Hydrogen in Metal Hydrides Revealed by Electron Ptychography Li, Pengcheng Pua, Chenglin Dong, Zehao Su, Zhengxiong Liu, Tao Cai, Chao Shen, Huahai Gu, Lin Chen, Zhen Materials Science Mesoscale and Nanoscale Physics Hydrogen plays critical roles in materials science, particularly for advancing technologies in hydrogen storage and phase manipulation, while also posing challenges like hydrogen embrittlement. Understanding its behavior, vital for improving material properties, requires precise determination of atomic-scale distribution-a persistent challenge due to hydrogen's weak electron scattering and high mobility, as well as the limitations of conventional transmission electron microscopy. We demonstrate that multislice electron ptychography (MEP) overcomes these constraints through three key advances: exceptional sensitivity for hydrogen occupancy, three-dimensional quantification, and picometer-level precision in atomic positioning. Experimentally, MEP resolves heterogeneous hydrogen distributions and quantifies hydrogen-induced lattice displacements with picometer precision in multi-principal-element alloy hydrides. This work demonstrates MEP as a transformative method for directly probing hydrogen atoms in solids, unlocking fundamental understanding of hydrogen's impact on material properties. |
| title | Atomic-Scale Heterogeneity of Hydrogen in Metal Hydrides Revealed by Electron Ptychography |
| topic | Materials Science Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2507.18906 |