In-plane anisotropic mechanical properties of two-dimensional NbOI2-Reference-Cited by-同舟云学术

In-plane anisotropic mechanical properties of two-dimensional NbOI2

Published:2023-07-31 Issue:5 Volume:123 Page:
ISSN:0003-6951
Container-title:Applied Physics Letters
language:en
Short-container-title:

Author:

Cui Yuanyuan¹^ORCID,Li Shuqi¹^ORCID,Zhang Xiangping¹^ORCID,wang Tingjun¹^ORCID,Cao Xinyu²^ORCID,Yan Shaohua³⁴,Zhang Xiao²^ORCID,Lei Hechang³⁴^ORCID,Tang Gang⁵^ORCID,Hong Jiawang¹^ORCID,Wang Xueyun¹^ORCID

Affiliation:

1. School of Aerospace Engineering, Beijing Institute of Technology 1 , Beijing 100081, China

2. State Key Laboratory of Information Photonics and Optical Communications & School of Science, Beijing University of Posts and Telecommunications 2 , Beijing 100876, China

3. Department of Physics and Beijing Key Laboratory of Optoelectronic Functional Materials & MicroNano Devices, Renmin University of China 3 , Beijing 100872, China

4. Key Laboratory of Quantum State Construction and Manipulation (Ministry of Education), Renmin University of China 4 , Beijing 100872, China

5. Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology 5 , Beijing 100081, China

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.

Funder

National Natural Science Foundation of China

National Key Research and Development Program of China

Natural Science Foundation of Beijing Municipality

Outstanding Innovative Talents Cultivation Funded Programs 2022 of Renmin University of China

Collaborative Research Project of Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology

Publisher

AIP Publishing

Subject

Physics and Astronomy (miscellaneous)

Link

https://pubs.aip.org/aip/apl/article-pdf/doi/10.1063/5.0159315/18068491/051905_1_5.0159315.pdf

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