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Chemical vapor deposition growth of molybdenum disulfide and its nanoscale tribological correlation with Raman spectroscopy
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Torrel, Sol. Chemical vapor deposition growth of molybdenum disulfide and its nanoscale tribological correlation with Raman spectroscopy. Retrieved from https://doi.org/doi:10.7282/T39026X7

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TitleChemical vapor deposition growth of molybdenum disulfide and its nanoscale tribological correlation with Raman spectroscopy
NameTorrel, Sol (author); Chhowalla, Manish (chair); Mann, Adrian (internal member); Klein, Lisa (internal member); Birnie, Dunbar (internal member); Asefa, Tewodros (outside member); Rutgers University; School of Graduate Studies
Date Created2017
Other Date2017-10 (degree)
SubjectMaterials Science and Engineering, Molybdenum disulfide
Extent1 online resource (x, 176 p. : ill.)
DescriptionIn this doctoral thesis work, two-dimensional (2D) molybdenum disulfide (MoS2) single crystals have been synthesized, characterized, and tribologically studied. Specifically, detailed analyses of processes that occur during chemical vapor deposition (CVD) of atomically thin MoS2 have been performed to understand key mechanisms responsible for reproducible growth of high quality materials. To this end, literature survey of growth parameters was performed and compared with original experiments performed here. The methods and mechanisms of nucleation and growth of large-area, single- and few-layer MoS2 are described with emphasis on variable control and repeatability. The synthesis work performed here provides new insights into the challenges of reproducible MoS2 growth using CVD. Following the CVD work, the thesis research included phase transformation of MoS2 – building on ongoing research in our group. The aim of this part of the research was to understand how chemistry can change the structural phase of 2D MoS2. More specifically, this work was performed to determine the root cause of challenges that are encountered during phase transformation. Finally, my primary focus and most of my efforts were devoted to study of the tribological properties of 2D MoS2 to further develop fundamental understanding of friction on the atomic level. Atomic force microscopy (AFM) was used to measure nanoscale tribological properties of semiconducting and metallic monolayer MoS2 to study the influence of electronic structure on friction behavior. Furthermore, various multilayer semiconducting polytypes of MoS2 were studied to elucidate the phononic contribution to friction. Electronic and phononic properties of this nanomaterial were probed, analyzed, and correlated through AFM and Raman spectroscopy. As a result, a preliminary methodology for remote prediction of friction behavior via laser excitation has been developed.
NotePh.D.
NoteIncludes bibliographical references
Noteby Sol Torrel
Genretheses, ETD doctoral
Persistent URLhttps://doi.org/doi:10.7282/T39026X7
Languageeng
CollectionSchool of Graduate Studies Electronic Theses and Dissertations
Organization NameRutgers, The State University of New Jersey
RightsThe author owns the copyright to this work.
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