Experimental Observation of Highly Anisotropic Elastic Properties of Two-Dimensional Black Arsenic

Jingjing Zhang, Shang Chen, Guoshuai Du, Yunfei Yu, Wuxiao Han, Qinglin Xia, Ke Jin*, Yabin Chen*

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

5 引用 (Scopus)

摘要

Anisotropic two-dimensional layered materials with low-symmetry lattices have attracted increasing attention due to their unique orientation-dependent mechanical properties. Black arsenic (b-As), with the puckered structure, exhibits extreme in-plane anisotropy in optical, electrical, and thermal properties. However, experimental research on mechanical properties of b-As is very rare, although theoretical calculations predicted the exotic elastic properties of b-As, such as the anisotropic Young’s modulus and negative Poisson’s ratio. Herein, experimental observations on highly anisotropic elastic properties of b-As were demonstrated using our developed in situ tensile straining setup based on the effective microelectromechanical system. The cyclic and repeatable load-displacement curves proved that Young’s modulus along the zigzag direction was ∼1.6 times greater than that along the armchair direction, while the anisotropic ratio of ultimate strain reached ∼2.5, attributed to the hinge structure in the armchair direction. This study could provide significant insights into the design of novel anisotropic materials and explore their potential applications in nanomechanics and nanodevices.

源语言英语
页(从-至)8970-8977
页数8
期刊Nano Letters
23
19
DOI
出版状态已出版 - 11 10月 2023

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Zhang, J., Chen, S., Du, G., Yu, Y., Han, W., Xia, Q., Jin, K., & Chen, Y. (2023). Experimental Observation of Highly Anisotropic Elastic Properties of Two-Dimensional Black Arsenic. Nano Letters, 23(19), 8970-8977. https://doi.org/10.1021/acs.nanolett.3c02515