期刊
APPLIED PHYSICS LETTERS
卷 105, 期 8, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4894101
关键词
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资金
- International Institute for Carbon Neutral Energy Research (WPI-I2CNER)
- Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT)
- Japan Society for the Promotion of Science, Japan [24560853]
- Grants-in-Aid for Scientific Research [24560853] Funding Source: KAKEN
In situ transmission electron microscopy (TEM) was performed to observe the hydrogenation of Mg-Ni films in a hydrogen atmosphere of 80-100 Pa. An aberration-corrected environmental TEM with a differential pumping system allows us to reveal the Angstrom-scale structure of the films in the initial stage of hydrogenation: first, nucleation and growth of Mg2NiH4 crystals with a lattice spacing of 0.22 nm in an Mg-rich amorphous matrix of the film occurs within 20 s after the start of the high-resolution observation, then crystallization of MgH2 with a smaller spacing of 0.15 nm happens after approximately 1 min. Our in situ TEM method is also applicable to the analysis of other hydrogen-related materials. (C) 2014 AIP Publishing LLC.
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