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

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dc.contributor.advisorHan, Yimoen_US
dc.creatorPieshkov, Timen_US
dc.date.accessioned2023-06-15T18:19:20Zen_US
dc.date.available2023-06-15T18:19:20Zen_US
dc.date.created2023-05en_US
dc.date.issued2023-03-23en_US
dc.date.submittedMay 2023en_US
dc.date.updated2023-06-15T18:19:20Zen_US
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.en_US
dc.format.mimetypeapplication/pdfen_US
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>.en_US
dc.identifier.urihttps://hdl.handle.net/1911/114912en_US
dc.language.isoengen_US
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.en_US
dc.subjectSTEMen_US
dc.subjectTEMen_US
dc.subjectFIBen_US
dc.subjectTMDen_US
dc.subjectCross-sectionen_US
dc.subjectSNRen_US
dc.titleInvestigation of the structure and elemental composition of 2D Interfaces in Transition Metal Dichalcogenidesen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentApplied Physicsen_US
thesis.degree.disciplineEngineeringen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Scienceen_US
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