Size-dependent mechanical properties of twin graphene

Fangyan Zhu, Jiantao Leng, Zhengrong Guo, Tienchong Chang
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引用次数: 3

Abstract

Twin Graphene, a novel 2D planar semiconducting carbon allotrope predicted recently, has attracted tremendous attention due to its potential applications in nano electromechanical systems (NEMS). In this paper, we use Molecular Dynamics simulations to investigate the mechanical properties of twin graphene. By performing uniaxial tensile loading, we find that the Young’s modulus, failure stress and fracture strain of a twin graphene sheet are strongly dependent on its size. Rectangular sheets show more apparent anisotropy of mechanical properties than square sheets. Our results also demonstrate that the fracture pattern of twin graphene is dependent on its geometry, as a result of its diverse bond types and orientations. These findings present an in-depth understanding of size dependent mechanical properties of twin graphene, and may benefit its future applications as building blocks of NEMS devices.
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双石墨烯的尺寸相关力学性能
双石墨烯是一种新型的二维平面半导体碳同素异形体,由于其在纳米机电系统(NEMS)中的潜在应用而引起了广泛的关注。在本文中,我们使用分子动力学模拟来研究双石墨烯的力学性能。通过进行单轴拉伸加载,我们发现双石墨烯片的杨氏模量、破坏应力和断裂应变与石墨烯片的尺寸密切相关。矩形板比方形板表现出更明显的力学性能各向异性。我们的研究结果还表明,由于其不同的键类型和取向,双石墨烯的断裂模式取决于其几何形状。这些发现提供了对双石墨烯尺寸相关力学性能的深入理解,并可能有利于其作为NEMS器件的构建块的未来应用。
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来源期刊
CiteScore
6.00
自引率
1.70%
发文量
24
期刊介绍: Proceedings of the Institution of Mechanical Engineers Part N-Journal of Nanomaterials Nanoengineering and Nanosystems is a peer-reviewed scientific journal published since 2004 by SAGE Publications on behalf of the Institution of Mechanical Engineers. The journal focuses on research in the field of nanoengineering, nanoscience and nanotechnology and aims to publish high quality academic papers in this field. In addition, the journal is indexed in several reputable academic databases and abstracting services, including Scopus, Compendex, and CSA's Advanced Polymers Abstracts, Composites Industry Abstracts, and Earthquake Engineering Abstracts.
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