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arXiv · 2102.05572

Direct imaging of dopant and impurity distributions in 2D MoS$_2$

Se-Ho Kim·Joohyun Lim·Rajib Sahu·Olga Kasian·Leigh T. Stephenson·Christina Scheu·Baptiste Gault
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Abstract

Molybdenum disulfide (MoS$_2$) nanosheet is a two-dimensional material with high electron mobility and with high potential for applications in catalysis and electronics. We synthesized MoS$_2$ nanosheets using a one-pot wet-chemical synthesis route with and without Re-doping. Atom probe tomography revealed that 3.8 at.% Re is homogeneously distributed within the Re-doped sheets. Other impurities are found also integrated within the material: light elements including C, N, O, and Na, locally enriched up to 0.1 at.%, as well as heavy elements such as V and W. Analysis of the non-doped sample reveals that the W and V likely originate from the Mo precursor.

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Se-Ho Kim, Joohyun Lim, Rajib Sahu, Olga Kasian, Leigh T. Stephenson, Christina Scheu, Baptiste Gault. 2021-02-10. Direct imaging of dopant and impurity distributions in 2D MoS$_2$. https://arxiv.org/abs/2102.05572

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