A singly oriented, single layer of tungsten disulfide (WS2) was epitaxially grown on Au(111) and characterized at the nanoscale by combining photoelectron spectroscopy, photoelectron diffraction, and low-energy electron microscopy. Fast x-ray photoelectron spectroscopy revealed that the growth of a single crystalline orientation is triggered by choosing a low W evaporation rate and performing the process with a high temperature of the substrate. Information about the single orientation of the layer was obtained by acquiring x-ray photoelectron diffraction patterns, revealing a 1H polytype for the WS2 layer and, moreover, determining the structural parameters and registry with the substrate. The distribution, size, and orientation of the WS2 layer were further ascertained by low-energy electron microscopy.

Growth and structure of singly oriented single-layer tungsten disulfide on Au(111)

BIGNARDI, LUCA
Membro del Collaboration Group
;
Bana, Harsh
Membro del Collaboration Group
;
Travaglia, Elisabetta
Membro del Collaboration Group
;
Baraldi, Alessandro
Membro del Collaboration Group
;
2019

Abstract

A singly oriented, single layer of tungsten disulfide (WS2) was epitaxially grown on Au(111) and characterized at the nanoscale by combining photoelectron spectroscopy, photoelectron diffraction, and low-energy electron microscopy. Fast x-ray photoelectron spectroscopy revealed that the growth of a single crystalline orientation is triggered by choosing a low W evaporation rate and performing the process with a high temperature of the substrate. Information about the single orientation of the layer was obtained by acquiring x-ray photoelectron diffraction patterns, revealing a 1H polytype for the WS2 layer and, moreover, determining the structural parameters and registry with the substrate. The distribution, size, and orientation of the WS2 layer were further ascertained by low-energy electron microscopy.
22-gen-2019
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https://journals.aps.org/prmaterials/pdf/10.1103/PhysRevMaterials.3.014003
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2934395
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