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journal article·2023-09Open access

Natural overlaying behaviors push the limit of planar cyclic deformation performance in few‐layer MoS2 nanosheets

Peifeng Li, Guangjie Zhang, Zhuo Kang, Xin Zheng, Yong Xie, Chunyuan Liang, Yizhi Zhang, Xiaoyang Fang, Rong Sun, Zhiquan Liu, Yeqiang Bu, Yang Lu, Yue Zhang

InfoMat· Volume 5· Issue 9
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Abstract

Abstract As a typical two‐dimensional (2D) transition metal dichalcogenides (TMDCs) material with nonzero band gap, MoS2 has a wide range of potential applications as building blocks in the field of nanoelectronics. The stability and reliability of the corresponding nanoelectronic devices depend critically on the mechanical performance and cyclic reliability of 2D MoS2. Although an in situ technique has been used to analyze the mechanical properties of 2D materials, the cyclic mechanical behavior, that is, fatigue, remains a major challenge in the practical application of the devices. This study was aimed at analyzing the planar cyclic performance and deformation behavior of three‐layer MoS2 nanosheets (NSs) using an in situ transmission electron microscopy (TEM) variable‐amplitude uniaxial low‐frequency and cyclic loading–unloading tensile acceleration test. We also elucidated the strengthening effect of the natural overlaying affix fragments (other external NSs) or wrinkle folds (internal folds from the NS itself) on cycling performances and service life of MoS2 NSs by delaying the whole process of fatigue crack initiation, propagation, and fracture. The results have been confirmed by molecular dynamics (MDs) simulations. The overlaying enhancement effect effectively ensures the long‐term reliability and stability of nanoelectronic devices made of few‐layer 2D materials. image
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Research context

Nanomaterials

OpenAlex topics: 2D Materials and Applications · MXene and MAX Phase Materials · Graphene research and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Shenzhen Institute of Advanced Electronic Materials, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences Shenzhen the People's Republic of China

CAS Key Laboratory of Standardization and Measurement for Nanotechnology CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology Beijing the People's Republic of China

Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Advanced Energy Materials and Technologies University of Science and Technology Beijing Beijing the People's Republic of China

State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering University of Science and Technology Beijing Beijing the People's Republic of China

College of Chemistry and Materials Engineering Zhejiang A&F University Hangzhou the People's Republic of China

Center for X‐mechanics, School of Aeronautics and Astronautics Zhejiang University Hangzhou People's Republic of China

Department of Mechanical Engineering The University of Hong Kong Hong Kong the People's Republic of China

Funding

National Key Research and Development Program of China · National Natural Science Foundation of China

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