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In-situ Transmission Electron Microscopy Investigation of WS2 Growth Mechanisms and Density Functional Theory Calculations on WS2

dc.rights.licenseCC-BY-NC-ND
dc.contributor.advisorHuis, M.A. van
dc.contributor.advisorGavhane, D.S.
dc.contributor.authorBückmann, J.I.
dc.date.accessioned2020-07-21T18:00:22Z
dc.date.available2020-07-21T18:00:22Z
dc.date.issued2020
dc.identifier.urihttps://studenttheses.uu.nl/handle/20.500.12932/36226
dc.description.abstractGrowth processes of WS2 have been studied via in-situ Transmission Electrons Microscopy (TEM) heating experiments. DFT calculations were performed on WS2 to investigate how magnetic properties affect the band-gap. TEM heating experiments taught us, that lattices grow in the temperature range of 100-800 ◦C and faceting occurred at 450 ◦C. With EDX spectroscopy a ratio of 1:2 for W:S has been found, confirming that WS2 is, indeed, formed. DFT calculations indicated that the WS2 structure is not magnetic. However, when magnetic properties are enforced, the band-gap and the fermi-energy is altered. External electric fields can thus be used for band-gap tuning, making WS2 a viable semi-conductor
dc.description.sponsorshipUtrecht University
dc.format.extent62662411
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.titleIn-situ Transmission Electron Microscopy Investigation of WS2 Growth Mechanisms and Density Functional Theory Calculations on WS2
dc.type.contentBachelor Thesis
dc.rights.accessrightsOpen Access
dc.subject.keywordsTransmission Electron Microscopy, Density Functional Theory, tungsten disulfide, vertically grown sheets, hexagonal lattices, spin-orbit coupling, VASP, in-situ, 2D nanomaterials
dc.subject.courseuuNatuur- en Sterrenkunde


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