Fingerprinting the Properties of WS<sub>2</sub> Nanostructures using Advanced Transmission Electron Microscopy Techniques

From Growth to Characterization

Doctoral thesis (2024)

Authors

S.E. van Heijst QN/Conesa-Boj Lab - AS
Research Group
QN/Conesa-Boj Lab (AS) (TU Delft)
Nanostructures Transmission electron microscopy (TEM) Transition metal dichalcogenides (TMDs) Chemical vapor deposition (CVD) Electron energy-loss spectroscopy (EELS) Four-dimensional scanning transmission electron microscopy (4D-STEM) Electron microscope pixel array detector (EMPAD)
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Published Date

2024

Language

English

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Faculty

Applied Sciences

Department

QN/Quantum Nanoscience

Research Group

QN/Conesa-Boj Lab

Abstract

Two-dimensional
(2D) layered materials have attracted the interest of the scientific community
following the discovery of graphene and its extraordinary properties. Of
particular interest is a class of materials called transition metal dichalcogenides
(TMDs). The materials within this class were discovered to show similarly
intriguing optical and electronic properties, when compared to graphene. Moreover,
research indicated that these properties are also highly sensitive to the TMDs'
underlying atomic structure. Gaining control over these structural properties
would enable the tuning of the physical and chemical properties, and hence
allow for the fabrication of novel TMD nanostructures with tailored
functionalities. Driven by this potential, we strive to gain a comprehensive
understanding of the relationship between the structural, chemical, and local
electronic properties of nanostructures based on one such TMD material:
tungsten disulfide (WS2). This in order to aid us in the exploitation of the
tunability of these physical properties through the fabrication of novel WS2
nanostructures. …