In-plane anisotropic mechanical properties of two-dimensional NbOI2

Yuanyuan Cui; Shuqi Li; Xiangping Zhang; Tingjun Wang; Xinyu Cao; Shaohua Yan; Xiao Zhang; Hechang Lei; Gang Tang; Jiawang Hong; Xueyun Wang

doi:10.1063/5.0159315

In-plane anisotropic mechanical properties of two-dimensional NbOI₂

Yuanyuan Cui, Shuqi Li, Xiangping Zhang, Tingjun Wang, Xinyu Cao, Shaohua Yan, Xiao Zhang, Hechang Lei, Gang Tang, Jiawang Hong^*, Xueyun Wang^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

Two-dimensional niobium oxide diiodide (NbOI₂) has recently attracted extensive attention due to its highly anisotropic band structures and rich physical characteristics in electronics and optoelectronics. Nevertheless, mechanical properties of NbOI₂ have not been systematically investigated, which are critical parameters for applications. Here, we determine the directional dependence of Young's modulus of thin NbOI₂ flakes by using an atomic force microscopy-based nanoindentation technique. We find that Young's moduli along two perpendicular in-plane crystalline axis, the c-axis and the a-axis, were 97.27 ± 2.12 and 51.51 ± 8.21 GPa, respectively. The anisotropic ratio is up to 1.89, which is a high anisotropy value in two-dimensional materials reported so far.

Original language	English
Article number	051905
Journal	Applied Physics Letters
Volume	123
Issue number	5
DOIs	https://doi.org/10.1063/5.0159315
Publication status	Published - 31 Jul 2023

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title = "In-plane anisotropic mechanical properties of two-dimensional NbOI2",

abstract = "Two-dimensional niobium oxide diiodide (NbOI2) has recently attracted extensive attention due to its highly anisotropic band structures and rich physical characteristics in electronics and optoelectronics. Nevertheless, mechanical properties of NbOI2 have not been systematically investigated, which are critical parameters for applications. Here, we determine the directional dependence of Young's modulus of thin NbOI2 flakes by using an atomic force microscopy-based nanoindentation technique. We find that Young's moduli along two perpendicular in-plane crystalline axis, the c-axis and the a-axis, were 97.27 ± 2.12 and 51.51 ± 8.21 GPa, respectively. The anisotropic ratio is up to 1.89, which is a high anisotropy value in two-dimensional materials reported so far.",

author = "Yuanyuan Cui and Shuqi Li and Xiangping Zhang and Tingjun Wang and Xinyu Cao and Shaohua Yan and Xiao Zhang and Hechang Lei and Gang Tang and Jiawang Hong and Xueyun Wang",

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doi = "10.1063/5.0159315",

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T1 - In-plane anisotropic mechanical properties of two-dimensional NbOI2

AU - Cui, Yuanyuan

AU - Li, Shuqi

AU - Zhang, Xiangping

AU - Wang, Tingjun

AU - Cao, Xinyu

AU - Yan, Shaohua

AU - Zhang, Xiao

AU - Lei, Hechang

AU - Tang, Gang

AU - Hong, Jiawang

AU - Wang, Xueyun

PY - 2023/7/31

Y1 - 2023/7/31

N2 - Two-dimensional niobium oxide diiodide (NbOI2) has recently attracted extensive attention due to its highly anisotropic band structures and rich physical characteristics in electronics and optoelectronics. Nevertheless, mechanical properties of NbOI2 have not been systematically investigated, which are critical parameters for applications. Here, we determine the directional dependence of Young's modulus of thin NbOI2 flakes by using an atomic force microscopy-based nanoindentation technique. We find that Young's moduli along two perpendicular in-plane crystalline axis, the c-axis and the a-axis, were 97.27 ± 2.12 and 51.51 ± 8.21 GPa, respectively. The anisotropic ratio is up to 1.89, which is a high anisotropy value in two-dimensional materials reported so far.

AB - Two-dimensional niobium oxide diiodide (NbOI2) has recently attracted extensive attention due to its highly anisotropic band structures and rich physical characteristics in electronics and optoelectronics. Nevertheless, mechanical properties of NbOI2 have not been systematically investigated, which are critical parameters for applications. Here, we determine the directional dependence of Young's modulus of thin NbOI2 flakes by using an atomic force microscopy-based nanoindentation technique. We find that Young's moduli along two perpendicular in-plane crystalline axis, the c-axis and the a-axis, were 97.27 ± 2.12 and 51.51 ± 8.21 GPa, respectively. The anisotropic ratio is up to 1.89, which is a high anisotropy value in two-dimensional materials reported so far.

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DO - 10.1063/5.0159315

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JO - Applied Physics Letters

JF - Applied Physics Letters

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ER -

In-plane anisotropic mechanical properties of two-dimensional NbOI₂

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