UID:
almahu_9949450757502882
Format:
XIV, 140 p. 91 illus., 86 illus. in color.
,
online resource.
Edition:
1st ed. 2022.
ISBN:
9783031120930
Series Statement:
Springer Theses, Recognizing Outstanding Ph.D. Research,
Content:
This thesis provides the first atomic length-scale observation of the structural transformation (referred to as lattice reconstruction) that occurs in moiré superlattices of twisted bilayer transition metal dichalcogenides (TMDs) at low (θ 〈 2˚) twist angles. Studies using Scanning transmission electron microscopy (STEM) were limited due to the complexity of the (atomically-thin) sample fabrication requirements. This work developed a unique way to selectively cut and re-stack monolayers of TMDs with a controlled rotational twist angle which could then be easily suspended on a TEM grid to meet the needs of the atomically thin sample requirements. The fabrication technique enabled the study of the two common stacking-polytypes including 3R and 2H (using MoS2 and WS2 as the example) as well as their structural evolution with decreasing twist-angle. Also reported is a comprehensive investigation of electronic properties using scanning probe microscopy and electrical transport measurements of the artificially-engineered structures. These and other studies highlight the unique intrinsic properties of TMDs and their potential application in the development of the next generation of optoelectronics.
Note:
Outline -- Introduction to 2-Dimensional Materials and Moiré Superlattices -- Fabrication Techniques -- Characterisation Techniques -- Atomic Structure of Reconstructed Lattices of Twisted Bilayer TMDs -- Electrical Properties of Reconstructed Lattices of Twisted Bilayer TMDs -- Final Conclusions and Future Outlooks.
In:
Springer Nature eBook
Additional Edition:
Printed edition: ISBN 9783031120923
Additional Edition:
Printed edition: ISBN 9783031120947
Additional Edition:
Printed edition: ISBN 9783031120954
Language:
English
DOI:
10.1007/978-3-031-12093-0
URL:
https://doi.org/10.1007/978-3-031-12093-0
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