在单层MoS2纳米丝带中逆极性强大的载体流动性
Yongqing Cai1, Gang Zhang, Yong-Wei Zhang
1Institute of High Performance Computing , 1 Fusionopolis Way, Singapore ,138632.
Journal of the American Chemical Society
|April 10, 2014
概括
在二硫化 (MoS2) 纳米带中,载体流动性仍然很高,与石墨烯不同. 宽度减小和边缘工程增强了MoS2的运输特性,显示极性逆转.
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
- 纳米科学是一个纳米科学.
背景情况:
- 二硫化物 (MoS2) 是一个有前途的2D材料用于电子.
- 了解MoS2纳米结构中的载体流动性对于设备应用至关重要.
- 在纳米带形式中,石墨烯表现出显著的性能降解.
研究的目的:
- 为了研究单层MoS2板和纳米带的内在载体流动性 (μ).
- 为了比较MoS2纳米带的运输特性与它们的二维板对应物.
- 探索宽度减小和边缘状态对MoS2载体移动性的影响.
主要方法:
- 第一原则计算.第一原则计算.
- 变形潜力理论. 变形潜力理论.
- 在不同宽度的MoS2板和扶手椅纳米丝带中分析载体移动性.
主要成果:
- MoS2纳米带的移动性与薄板的移动性相当,与石墨烯不同.
- 在MoS2纳米带中载体的移动性与带宽的振荡.
- 在4纳米MoS2纳米带中观察到室温转运极性反转.
- 孔移动性 (200.52 厘米2 V-1 s-1) 和电子移动性 (72.16 厘米2 V-1 s-1) 在板.
- 在4纳米纳米带中,孔移动性 (49.72厘米2V-1s-1) 和电子移动性 (190.89厘米2V-1s-1).
结论:
- MoS2纳米带表现出高和强大的载体移动性.
- 在MoS2纳米带中的边缘状态负责观察到的极性逆转.
- 宽度减小和边缘工程是优化MoS2纳米结构传输性能的有效策略.
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