在二硫化 (MoS) 中的粒度边界的结构和机械特性
Robert D Moore1, N Scott Bobbitt2, Ian S Winter2
1Department of Materials Science and Engineering, Lehigh University, Bethlehem, PA, 18015 USA. fadi@lehigh.edu.
Nanoscale
|December 9, 2025
概括
在二硫化物 (MoS2) 中的颗粒边界工程对于调整其机械性能至关重要. 模拟显示温度影响变形机制,并降低MoS2双晶体的强度和可塑性.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 部落学 (tribology) 是一个学科.
背景情况:
- 二硫化物 (MoS2) 是一种2D材料,在各种机械和热条件下作为滑剂使用.
- 多晶MoS2是常见的,使得谷物边界 (GB) 结构-属性关系对材料设计至关重要.
研究的目的:
- 在不同温度下研究各种MoS2颗粒边界 (GBs) 的原子结构和机械行为.
- 了解GBs如何影响MoS2.2的变形机制和整体机械性能.
主要方法:
- 使用了经典的,反应性原子模拟.
- 用双晶MoS2几何来描述GB的原子结构和能量.
- 在多个温度下对MoS2双晶体进行了拉伸变形模拟.
主要成果:
- 在100K以上,MoS2双晶变形涉及来自GBs的剪切带核化.
- 在低温下,变形面会改变结合角度和长度.
- 最终的拉力应力和故障应力随着温度的增加而降低.
- 变态稳定的GBs表现出降低的强度和延展性与更高的能量.
结论:
- 在GBs,温度显著影响MoS2变形机制.
- GB的能量与机械强度和柔性降低有关.
- 谷物边界工程提供了一个策略来定制MoS2属性.
更多相关视频
08:12Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures
Published on: December 5, 2015
12.7K
08:50Preparation of Large-area Vertical 2D Crystal Hetero-structures Through the Sulfurization of Transition Metal Films for Device Fabrication
Published on: November 28, 2017
9.6K
相关概念视频
MOSFET: Enhancement Mode
750
Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
750
Characteristics of MOSFET
886
Metal-oxide-semiconductor field-effect Transistors, or MOSFETs, play a critical role in electronic circuits. They are primarily utilized for amplifying and switching signals.
Various vital parameters influence their functionality, which is crucial for theory and electronics applications. First, channel dimensions, precisely length, and width, are pivotal. The size of these channels affects the transistor's ability to carry current and switching speeds; shorter channels typically enable...
Various vital parameters influence their functionality, which is crucial for theory and electronics applications. First, channel dimensions, precisely length, and width, are pivotal. The size of these channels affects the transistor's ability to carry current and switching speeds; shorter channels typically enable...
886
Valence Bond Theory
11.1K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
11.1K
Hybridization of Atomic Orbitals I
65.2K
The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
65.2K
Network Covalent Solids
16.0K
Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
16.0K
MOSFET: Depletion Mode
794
Depletion-mode MOSFETs represent a unique subset of MOSFET technology, functioning fundamentally differently from their enhancement-mode counterparts. Unlike enhancement MOSFETs, which require a positive gate-source voltage (Vgs) to turn on, depletion-mode MOSFETs are inherently conductive and "normally on" devices.
The primary characteristic of depletion-mode MOSFETs is their ability to conduct current between the drain and source terminals without gate bias. This inherent conductivity...
The primary characteristic of depletion-mode MOSFETs is their ability to conduct current between the drain and source terminals without gate bias. This inherent conductivity...
794
