Folded MoS2 layers with reduced interlayer coupling

We study molybdenum disulfide （MoS2） structures generated by folding single-layer and bilayer MoS2 flakes. We find that this modified layer stacking leads to a decrease in the interlayer coupling and an enhancement of the photoluminescence emission yield. We additionally find that folded single-laye...

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Bibliographic Details
Published in:Nano research 2014-04, Vol.7 (4), p.572-578
Main Author: Andres Castellanos-Gomez Herre S. J. van der Zant Gary A. Steele
Format: Article
Language:English
Subjects:
Atomic/Molecular Structure and Spectra
Biomedicine
Biotechnology
Chemistry and Materials Science
Condensed Matter Physics
Materials Science
MoS2
Nanotechnology
Research Article
二硫化钼
光发射
光致发光光谱
单层
层间耦合
折叠
改性层
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Summary:We study molybdenum disulfide （MoS2） structures generated by folding single-layer and bilayer MoS2 flakes. We find that this modified layer stacking leads to a decrease in the interlayer coupling and an enhancement of the photoluminescence emission yield. We additionally find that folded single-layer MoS2 structures show a contribution to photoluminescence spectra of both neutral and charged excitons, which is a characteristic feature of single-layer MoS2 that has not been observed in multilayer MoS2. The results presented here open the door to fabrication of multilayered MoS2 samples with high optical absorption while maintaining the advantageous enhanced photoluminescence emission of single-layer MoS2 by controllably twisting the MoS2 layers.
ISSN:1998-0124
1998-0000
DOI:10.1007/s12274-014-0425-z