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层间滑动工程引发了集团-VA纳米板中的意想不到的平面外的压电

Zhifang Liu^1,2, Jia Long¹, Huaqiang Cao²

¹Institute of Atomic Manufacturing, International Research Institute for Multidisciplinary Science, Beihang University, Beijing, China.

Small (Weinheim an der Bergstrasse, Germany)

|December 22, 2025

概括

研究人员在比斯木和纳米板中发现了压电性,这些材料通常不是压电性的. 这一突破利用堆叠模式工程来打破对称性,使新的纳米电机设备成为可能.

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:

由于对称性约束,在β相 (Bi) 和 (Sb) 等中心对称材料中通常没有压电.
传统的2D压电材料在应用方面是有限的.

研究的目的:

调查和证明之前未报告的β相Bi和Sb纳米片中的平面外压电.
探索一种用于诱导非压电二维材料中的压电性的新机制.

主要方法:

通过电化学剥落合成β相Bi和Sb纳米片.
使用Piezoresponse Force Microscopy (PFM) 进行表征,以测量压电反应.
测量第二子 (SHG) 测量以确认对称性破坏.
密度函数理论 (DFT) 计算,以了解底层机制.

主要成果:

在β相Bi和Sb纳米片中实验证实了显著的平面外压电.
测量的纵向压电系数 (d₃₃) 高达~200 pm V^-1,与已建立的二维压电器具有竞争力.
DFT的计算显示,在剥皮过程中层间滑动会诱导AA-到AB-堆叠过渡,从而打破反向对称.

结论:

层间堆叠模式工程是一种可行的通用机制,可以在非压电二维材料中诱导压电.
这一发现为开发利用Bi和Sb纳米板的新型纳米电机和压触媒设备开辟了道路.

关键词:

两维材料是二维材料.电化学脱皮电化学脱皮介层间的滑落会发生.在平面外的压电.对称性打破破坏对称性

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