Electronic-dimensionality reduction of bulk MoS2 by hydrogen treatment

Physical Chemistry Chemical Physics : PCCP
Soohyun ChoSeung Ryong Park

Abstract

A reduction in the electronic-dimensionality of materials is one method for achieving improvements in material properties. Here, a reduction in electronic-dimensionality is demonstrated using a simple hydrogen treatment technique. Quantum well states from hydrogen-treated bulk 2H-MoS2 are observed using angle resolved photoemission spectroscopy (ARPES). The electronic states are confined within a few MoS2 layers after the hydrogen treatment. A significant reduction in the band-gap can also be achieved after the hydrogen treatment, and both phenomena can be explained by the formation of sulfur vacancies generated by the chemical reaction between sulfur and hydrogen.

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Methods Mentioned

BETA
transmission electron microscopy
X-ray
atomic force microscopy

Software Mentioned

Vienna ab initio simulation package ( VASP )
ARPES

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