解读金属单基化物中的超高可塑性
Lok Wing Wong1,2, Ke Yang1,2, Wei Han1,2
1Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China.
Nature materials
|January 8, 2024
概括
研究人员在二维 (2D) 金属单基 (MX) 材料中发现了超高的可塑性. 这种可塑性是由相位过渡和层间滑动驱动的,使灵活,耐用的电子设备成为可能.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 纳米技术纳米技术
背景情况:
- 二维 (2D) 范德瓦尔斯材料对灵活,可穿戴和耐用电子产品具有前景.
- 化表现出显著的超高可塑性,促使进一步调查这一现象.
- 了解二维材料的可塑性对于开发下一代半导体至关重要.
研究的目的:
- 研究2D范德瓦尔斯材料中超高可塑性背后的机制.
- 探索金属单化物 (MX) 和过渡金属二化物 (MX2) 作为无机塑料半导体的潜力.
- 阐明阶段转换和层间滑动在塑性变形中的作用.
主要方法:
- 对MX和MX2材料进行实验研究.
- 塑性变形模式的理论分析.
- 阶段过渡,层间滑动和微裂形成的表征.
主要成果:
- 确定了MX材料中的一般塑性变形模式,与传统材料中的脱位驱动塑性不同.
- 阶段过渡,层间滑动和微裂的协同效应促进了MX材料的可塑性.
- 增强的滑动屏障可以通过堆叠顺序变化后的固定效应来防止宏观骨折.
结论:
- 在2D MX材料中发现超高可塑性和相位过渡机制是重要的.
- 这些发现为设计和开发高性能无机塑料半导体铺平了道路.
- 这项研究为灵活和可穿戴的电子应用开辟了新的途径.
相关概念视频
Metallic Solids
18.4K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
18.4K
Plasticity
2.1K
Plasticity is the property where an object loses its elasticity and undergoes irreversible deformation, even after the deformation forces are eliminated. If a material deforms irreversibly without increasing stress or load, then this is called ideal plasticity. For example, when a force is applied to an aluminum rod, it changes its shape, but it does not return to its original shape once the force is removed. Plastic deformation or ductility is thus a permanent deformation or change in the...
2.1K
Colors and Magnetism
11.7K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
11.7K


