在表轴性化纳米膜中,的依赖同位素的位点占用
T Ozawa1, Y Sugisawa2, Y Komatsu3
1Institute of Industrial Science, The University of Tokyo, Meguro, Tokyo, Japan. t-ozawa@iis.u-tokyo.ac.jp.
Nature communications
|November 14, 2024
概括
我们精确地在化纳米膜中定位了和. 占据了八面体和四面体的位置,而更喜欢四面体的位置,可以控制与有关的现象.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 核物理 核物理 核物理
背景情况:
- 众所周知,能够透材料并改变其性质.
- 了解的晶格位置对于控制引起的影响至关重要.
研究的目的:
- 在化纳米膜中实验性地确定 (H) 和 (D) 的晶格位置.
- 调查影响和 deuterium 场地占用因素.
主要方法:
- 结合核反应分析 (NRA) 与离子通道技术.
- 分析了NRA产量的二维角度映射.
- 进行密度函数理论 (DFT) 计算.
主要成果:
- 11%的H占有八面体位点,其余部分位于四面体位点.
- (D) 完全占用了四面体位点.
- DFT的计算表明,费米水平转移和Jahn-Teller效应稳定了H在八面体位置,而D的偏好是由于零点振动能量 (质量效应).
结论:
- 和在化中表现出明显的位置偏好.
- 通过调整同位素混合物比率,可以控制现场占用.
- 这种控制为新相关现象开辟了道路.
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