Differentiating Polymorphs in Molybdenum Disulfide via Electron Microscopy

Advanced Materials
Xiaoxu ZhaoKian Ping Loh

Abstract

The presence of rich polymorphs and stacking polytypes in molybdenum disulfide (MoS2 ) endows it with a diverse range of electrical, catalytic, optical, and magnetic properties. This has stimulated a lot of interest in the unique properties associated with each polymorph. Most techniques used for polymorph identification in MoS2 are macroscopic techniques that sample averaged properties due to their limited spatial resolution. A reliable way of differentiating the atomic structure of different polymorphs is needed in order to understand their growth dynamics and establish the correlation between structure and properties. Herein, the use of electron microscopy for identifying the atomic structures of several important polymorphs in MoS2 , some of which are the subjects of mistaken assignment in the literature, is discussed. In particular, scanning transmission electron microscopy-annular dark field imaging has emerged as the most effective and reliable approach for identifying the different phases in MoS2 and other 2D materials because its images can be directly correlated to the atomic structures. Examples of the identification of polymorphs grown under different conditions in molecular beam epitaxy or chemical vapor deposition...Continue Reading

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Citations

Feb 28, 2019·Advanced Materials·Xiaoxu ZhaoKian Ping Loh
Feb 21, 2019·Advanced Materials·Xiaoxu ZhaoKian Ping Loh
May 27, 2020·Chemical Society Reviews·Maria S Sokolikova, Cecilia Mattevi
Dec 22, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Juan AliagaEglantina Benavente
Jul 28, 2020·Nature Communications·Lixing KangZheng Liu
Feb 29, 2020·Chemical Science·Yifan SunRaymond E Schaak
Oct 3, 2020·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Xiaoxu ZhaoStephen J Pennycook
Feb 10, 2021·ACS Applied Materials & Interfaces·Myeongjin JangKwanpyo Kim
Mar 5, 2021·Accounts of Chemical Research·Yifan SunRaymond E Schaak
Dec 12, 2019·ACS Nano·Ziqian WangMingwei Chen
Jan 22, 2020·Journal of the American Chemical Society·Ya DengZheng Liu
Nov 20, 2021·ACS Applied Materials & Interfaces·Farman UllahYong Soo Kim

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