Investigation of the structure and elemental composition of 2D Interfaces in Transition Metal Dichalcogenides

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dc.contributor.advisorHan, Yimo
dc.creatorPieshkov, Tim
dc.date.accessioned2023-06-15T18:19:20Z
dc.date.available2023-06-15T18:19:20Z
dc.date.created2023-05
dc.date.issued2023-03-23
dc.date.submittedMay 2023
dc.date.updated2023-06-15T18:19:20Z
dc.description.abstractThe electronics boom happened with the invention of semiconductor materials with Si becoming the number one in the race. But now, since Si electronics seems to be reaching its limit, the researchers are switching their attention to 2D materials because of their unique electrical, mechanical, or optical properties. Transition metal dichalcogenides (TMDs) are semiconductor materials from this family that show promise to be the next generation of nanoelectronics as well as give possibility to improve energy or informational storage. However, for maintaining high efficiency, the structure of TMDs should have minimum number of defects, misfits, or inclusions of other elements. This indicates a need to understand the structural and elemental composition of the 2D materials to atomic scales, and this is where techniques like (scanning) transmission electron microscopy (S)TEM and energy-dispersive x-ray spectroscopy (EDX) come to aid. In this study, we will discuss sample preparation and analysis techniques for of SnSe, MoS2, WS2, WSe2, and graphene/Al heterostructures on silicon wafer and sapphire substrates, the methods of uncovering the elemental and layer composition of these materials and provide image and signal processing approaches to increase the signal-to-noise ratio of the currently employed techniques. All of these will help us reach a conclusion about atomic structure and elemental composition of the materials and show the possible traps and pitfalls that a microscopist might encounter during similar analysis for either TMDs or other types of 2D materials.
dc.format.mimetypeapplication/pdf
dc.identifier.citationPieshkov, Tim. "Investigation of the structure and elemental composition of 2D Interfaces in Transition Metal Dichalcogenides." (2023) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/114912">https://hdl.handle.net/1911/114912</a>.
dc.identifier.urihttps://hdl.handle.net/1911/114912
dc.language.isoeng
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.
dc.subjectSTEM
dc.subjectTEM
dc.subjectFIB
dc.subjectTMD
dc.subjectCross-section
dc.subjectSNR
dc.titleInvestigation of the structure and elemental composition of 2D Interfaces in Transition Metal Dichalcogenides
dc.typeThesis
dc.type.materialText
thesis.degree.departmentApplied Physics
thesis.degree.disciplineEngineering
thesis.degree.grantorRice University
thesis.degree.levelMasters
thesis.degree.nameMaster of Science
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