Probing the Effective Young's Modulus of ‘Magic Angle’ Inspired Multi‐Functional Twisted Nano‐Heterostructures,Advanced Theory and Simulations

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Probing the Effective Young's Modulus of ‘Magic Angle’ Inspired Multi‐Functional Twisted Nano‐Heterostructures
Advanced Theory and Simulations ( IF 2.9 ) Pub Date : 2020-09-06 , DOI: 10.1002/adts.202000129
T. Mukhopadhyay ₁ , A. Mahata ₂ , S. Naskar ₃ , S. Adhikari ₄

Affiliation

Two‐dimensional (2D) materials are crucially important nanomaterials because of their exciting multi‐functional properties. However, a single layer of 2D materials may not have a certain property adequately, or multiple application‐specific properties simultaneously to the desired and optimal level. For mitigating this lacuna, a new trend has emerged recently to develop nano‐scale engineered heterostructures by stacking multiple layers of different 2D materials, wherein each of the layers could also be twisted. The vast advantage of combining single layers of different 2D materials with different twisting angles has dramatically expanded this research field well beyond the scope of considering a 2D material mono‐layer, leading to a set of multifunctional physical properties corresponding to each possible combination of number of layers, different 2D materials therein, stacking sequence and the twisting angle of each layer. Effective mechanical properties such as Young's moduli are generally of utmost importance for analyzing the viability of such engineered nano‐heterostructures in various nanoelectromechanical applications. Efficient closed‐form generic formulae are proposed for the effective Young's moduli of twisted multi‐layer heterostructures. Based on this physics‐based analytical approach, a wide range of insightful new results are presented for twisted heterostructures, covering mono‐planar and multi‐planar configurations with homogeneous and heterogeneous atomic distributions.

中文翻译：

探索“魔角”启发的多功能扭曲纳米异质结构的有效杨氏模量

二维（2D）材料由于其令人兴奋的多功能特性而成为至关重要的纳米材料。但是，单层2D材料可能没有足够的某种特性，或者同时具有多个特定于应用程序的特性达到理想和最佳水平。为了缓解这种缺陷，近来出现了一种新的趋势，即通过堆叠不同的2D材料的多层来开发纳米级工程异质结构，其中每一层也可以扭曲。将具有不同扭转角的不同2D材料的单层组合的巨大优势极大地扩展了该研究领域，大大超出了考虑2D材料单层的范围，从而导致了一组对应于每种可能数量的组合的多功能物理性能。层不同的2D材料，堆叠顺序和每一层的扭曲角度。有效的机械性能（例如杨氏模量）通常对于分析此类工程化的纳米异质结构在各种纳米机电应用中的可行性至关重要。针对扭曲的多层异质结构的有效杨氏模量，提出了有效的闭式通用公式。基于这种基于物理学的分析方法，针对扭曲的异质结构提出了许多有见地的新结果，涵盖了具有均质和异质原子分布的单平面和多平面配置。对于在各种纳米机电应用中分析这种工程化的纳米异质结构的生存力而言，s模量通常至关重要。针对扭曲的多层异质结构的有效杨氏模量，提出了有效的闭式通用公式。基于这种基于物理学的分析方法，针对扭曲的异质结构提出了许多有见地的新结果，涵盖了具有均质和异质原子分布的单平面和多平面配置。对于在各种纳米机电应用中分析这种工程化的纳米异质结构的生存力而言，s模量通常至关重要。针对扭曲的多层异质结构的有效杨氏模量，提出了有效的闭式通用公式。基于这种基于物理学的分析方法，针对扭曲的异质结构提出了许多有见地的新结果，涵盖了具有均质和异质原子分布的单平面和多平面配置。

更新日期：2020-10-05

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