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Experimental nanomechanics of 2D materials for strain engineering

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Abstract

The past 2 decades have witnessed the explosion of research on two-dimensional (2D) materials, where notable efforts have been made in the synthesis and design of a wide spectrum of applications. To understand their mechanical properties and responses triggered by deformation, the prerequisites for reliable applications under realistic service conditions, novel experimental methods have to be developed due to the limitations of traditional bulk mechanical testing for atomically-thin structures. Besides, the nearly-ideal 2D crystalline structures of many 2D materials endow them the great capability of deformation, showing promising potentials in “strain engineering” and “interface engineering” applications. This review summaries several representative approaches in experimental nanomechanics and corresponding progresses in the characterization of structural and mechanical properties of 2D materials, with the aim to provide insights into the instrumental design for nanomechanical tests. In addition, examples of strain-tuned material behaviors and changes in their performance are also discussed to demonstrate the significance of the nanomechanical approach for functional device design and applications.

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Funding

The authors acknowledge the financial supports from Hong Kong Research Grant Council (RGC) under the GRF CityU11216515 and CityU11207416, City University of Hong Kong under SRG 7005070, and National Natural Science Foundation of China (NSFC) through Grants No. 11825203 and No. 11922215.

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Authors and Affiliations

  1. Department of Mechanical Engineering, City University of Hong Kong, Kowloon, Hong Kong, China

    Ying Han, Jingzhuo Zhou, Heyi Wang & Yang Lu

  2. Applied Mechanics Laboratory, Department of Engineering Mechanics and Center for Nano and Micro Mechanics, Tsinghua University, Beijing, 100084, China

    Shizhe Feng & Zhiping Xu

  3. School of Mechano-Electronic Engineering, Xidian University, Xi’an, 710071, China

    Libo Gao & Ke Cao

  4. CityU-Xidian Joint Laboratory of Micro/Nano-Manufacturing, Shenzhen Research Institute of City University of Hong Kong, Shenzhen, 518057, China

    Libo Gao & Yang Lu

  5. Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, Hong Kong, China

    Yang Lu

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  1. Ying Han
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Han, Y., Zhou, J., Wang, H. et al. Experimental nanomechanics of 2D materials for strain engineering. Appl Nanosci 11, 1075–1091 (2021). https://doi.org/10.1007/s13204-021-01702-0

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