From Point to Line Defects in Two-Dimensional Transition Metal Dichalcogenides: Insights from Transmission Electron Microscopy and First-Principles Calculations

H. P. Komsa*, A. V. Krasheninnikov

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

1 Citation (Scopus)

Abstract

Two-dimensional (2D) transition metal dichalcogenides (TMDs) have recently received great deal of attention due to their unique properties associated with the reduced dimensionality of the system. The properties of these materials have been shown to be affected by atomic defects in the atomic network. The very structure of these materials which are composed from three atomic layers only, combined with dramatic improvements in microscopy techniques, made it possible to study the behavior of defects in these systems with unprecedented accuracy. Various point and line defects were identified, and their effects on the properties of the systems were accessed. It was demonstrated that point defects induced by electron beam irradiation coalesce in line defects, but their quasi-one dimensional atomic structure varies from member to member in the transition metal dichalcogenides family. In this review, we summarize recent experimental and theoretical findings in this area, discuss how the line structures appear due to the agglomeration of point defects, and dwell upon how line defects can be used to engineer properties of 2D TMDs. Finally, we address the challenges in this field and issues which still lack the explanation.

Original languageEnglish
Title of host publicationGraphITA
Subtitle of host publicationSelected papers from the Workshop on Synthesis, Characterization and Technological Exploitation of Graphene and 2D Materials Beyond Graphene
Pages71-85
Number of pages15
ISBN (Electronic)978-3-319-58134-7
DOIs
Publication statusPublished - 2017
MoE publication typeA3 Part of a book or another research book
EventWorkshop on Synthesis, Characterization and Technological Exploitation of Graphene and 2D Materials Beyond Graphene - Bologna, Italy
Duration: 14 Sep 201518 Sep 2015

Publication series

NameCarbon Nanostructures
ISSN (Print)2191-3005
ISSN (Electronic)2191-3013

Workshop

WorkshopWorkshop on Synthesis, Characterization and Technological Exploitation of Graphene and 2D Materials Beyond Graphene
CountryItaly
CityBologna
Period14/09/201518/09/2015

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