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Chemical vapor deposition growth of molybdenum disulfide and its nanoscale tribological correlation with Raman spectroscopy

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Title
Chemical vapor deposition growth of molybdenum disulfide and its nanoscale tribological correlation with Raman spectroscopy
Name (type = personal)
NamePart (type = family)
Torrel
NamePart (type = given)
Sol
NamePart (type = date)
1984-
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Sol Torrel
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RoleTerm (authority = RULIB)
author
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Chhowalla
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Manish
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Manish Chhowalla
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Advisory Committee
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chair
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Mann
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Adrian
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Adrian Mann
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Advisory Committee
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internal member
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Klein
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Lisa
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Lisa Klein
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Advisory Committee
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internal member
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Birnie
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Dunbar
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Dunbar Birnie
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Advisory Committee
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internal member
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Asefa
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Tewodros
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Tewodros Asefa
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Advisory Committee
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Rutgers University
Role
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degree grantor
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School of Graduate Studies
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school
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theses
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DateCreated (qualifier = exact)
2017
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2017-10
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2017
Place
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xx
Language
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eng
Abstract (type = abstract)
In 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.
Subject (authority = RUETD)
Topic
Materials Science and Engineering
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Title
Rutgers University Electronic Theses and Dissertations
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ETD
Identifier
ETD_8283
PhysicalDescription
Form (authority = gmd)
electronic resource
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application/pdf
InternetMediaType
text/xml
Extent
1 online resource (x, 176 p. : ill.)
Note (type = degree)
Ph.D.
Note (type = bibliography)
Includes bibliographical references
Subject (authority = ETD-LCSH)
Topic
Molybdenum disulfide
Note (type = statement of responsibility)
by Sol Torrel
RelatedItem (type = host)
TitleInfo
Title
School of Graduate Studies Electronic Theses and Dissertations
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rucore10001600001
Location
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NjNbRU
Identifier (type = doi)
doi:10.7282/T39026X7
Genre (authority = ExL-Esploro)
ETD doctoral
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Rights

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The author owns the copyright to this work.
RightsHolder (type = personal)
Name
FamilyName
Torrel
GivenName
Sol
Role
Copyright Holder
RightsEvent
Type
Permission or license
DateTime (encoding = w3cdtf); (qualifier = exact); (point = start)
2017-08-09 16:23:28
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Name
Sol Torrel
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Affiliation
Rutgers University. School of Graduate Studies
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Author Agreement License
Detail
I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
Copyright
Status
Copyright protected
Availability
Status
Open
Reason
Permission or license
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