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Light-Induced Surface Potential Modification in MoS2 Monolayers on Au Nanostripe Arrays

Title
Light-Induced Surface Potential Modification in MoS2 Monolayers on Au Nanostripe Arrays
Authors
Kwon S.Kwon M.H.Song J.Kim E.Kim Y.Kim B.R.Hyun J.K.Lee S.W.Kim D.-W.
Ewha Authors
김동욱현가담이상욱
SCOPUS Author ID
김동욱scopus; 현가담scopus; 이상욱scopus
Issue Date
2019
Journal Title
Scientific Reports
ISSN
2045-2322JCR Link
Citation
Scientific Reports vol. 9, no. 1
Publisher
Nature Publishing Group
Indexed
SCI; SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
In this work, the surface potential (VS) of exfoliated MoS2 monolayers on Au nanostripe arrays with period of 500 nm was investigated using Kelvin probe force microscopy. The surface morphology showed that the suspended MoS2 region between neighboring Au stripes underwent tensile-strain. In the dark, the VS of the MoS2 region on the Au stripe (VS-Au) was larger than that of the suspended MoS2 region (VS-S). However, under green light illumination, VS-Au became smaller than VS-S. To explain the VS modification, band diagrams have been constructed taking into consideration not only the local strain but also the electronic interaction at the MoS2/Au interface. The results of this work provide a basis for understanding the electrical properties of MoS2-metal contacts and improving the performance of MoS2-based optoelectronic devices. © 2019, The Author(s).
DOI
10.1038/s41598-019-50950-2
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자연과학대학 > 물리학전공 > Journal papers
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