Pulsed laser deposition of single-layer MoS2 on Au(111): from nanosized crystals to large-area films.

ABSTRACT: Molybdenum disulphide (MoS2) is a promising material for heterogeneous catalysis and novel two-dimensional (2D) optoelectronic devices. In this work, we synthesized single-layer (SL) MoS2 structures on Au(111) by pulsed laser deposition (PLD) under ultra-high vacuum (UHV) conditions. By controlling the PLD process, we were able to tune the sample morphology from low-coverage SL nanocrystals to large-area SL films uniformly wetting the whole substrate surface. We investigated the obtained MoS2 structures at the nanometer and atomic scales by means of in situ scanning tunneling microscopy/spectroscopy (STM/STS) measurements, to study the interaction between SL MoS2 and Au(111)-which for example influences MoS2 lattice orientation-the structure of point defects and the formation of in-plane M

SUBMITTER: Tumino F 

PROVIDER: S-EPMC6394891 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature