Laminated bilayer MoS2 with weak interlayer coupling

Wenda Zhou, Cailei Yuan, Aijun Hong, Xingfang Luo, Wen Lei

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Laminated bilayer MoS2 structures are prepared with MoS2 nanoparticles trapped between two individual MoS2 layers which can prevent the formation of a true stacking structure held together by van der Waals interaction. The laminated bilayer MoS2 clearly indicates a weak interlayer coupling with reduced van der Waals interaction between adjacent layers. As the interlayer coupling is insufficient to modify the band structure of MoS2, the laminated bilayer MoS2 can retain the direct bandgap structure of an isolated monolayer. Furthermore, by controlling the size of the MoS2 nanoparticles trapped in between, the interlayer distance and interlayer coupling of bilayer MoS2 structures can be engineered in a wide range, resulting in different bandgap behaviors. This finding is extremely important as it provides an effective approach to fabricate bandgap engineered bilayer MoS2 structures, which is a crucial step forward to making multi-layer MoS2-based p-n junctions and homo/hetero-structures, and thus advanced electronic devices, especially optoelectronic devices. This approach is applied to not only bilayer MoS2 structures, but also other layer structured two-dimensional materials.

Original languageEnglish
Pages (from-to)1145-1152
Number of pages8
JournalNanoscale
Volume10
Issue number3
DOIs
Publication statusPublished - 21 Jan 2018

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