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Design, synthesis and characterization of novel semiconducting metal chalcogenides with multifunctional properties

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Title
Design, synthesis and characterization of novel semiconducting metal chalcogenides with multifunctional properties
Name (ID = NAME001); (type = personal)
NamePart (type = family)
Wu
NamePart (type = given)
Min
NamePart (type = date)
1977-
DisplayForm
Min Wu
Role
RoleTerm (authority = RUETD)
author
Name (ID = NAME002); (type = personal)
NamePart (type = family)
Li
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Jing
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Advisory Committee
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Jing Li
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chair
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NamePart (type = family)
Brennan
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John
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Advisory Committee
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John Brennan
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internal member
Name (ID = NAME004); (type = personal)
NamePart (type = family)
Hall
NamePart (type = given)
Gene
Affiliation
Advisory Committee
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Gene Hall
Role
RoleTerm (authority = RULIB)
internal member
Name (ID = NAME005); (type = personal)
NamePart (type = family)
Yuen
NamePart (type = given)
Tan
Affiliation
Advisory Committee
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Tan Yuen
Role
RoleTerm (authority = RULIB)
outside member
Name (ID = NAME006); (type = corporate)
NamePart
Rutgers University
Role
RoleTerm (authority = RULIB)
degree grantor
Name (ID = NAME007); (type = corporate)
NamePart
Graduate School - New Brunswick
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school
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Text
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theses
OriginInfo
DateCreated (qualifier = exact)
2008
DateOther (qualifier = exact); (type = degree)
2008-01
Language
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English
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electronic
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application/pdf
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text/xml
Extent
xi, 82 pages
Abstract
Metal chalcogenides possess a wide range of interesting chemical and physical properties, including low-temperature superconductivity, semiconductivity, ionic conductivity, intercalation, and optical properties. To expand chalcogenides beyond their traditional applications, it is desirable to generate novel chalcogenide materials with multifunctionality for uses in the areas of catalysis, separation, ion exchange, and gas storage by modifying the framework architectures and tuning the chemical components. The primary focus of my Ph. D. study is to design and synthesize chalcogenide materials with new structures and interesting multifunctional properties. The large variety of chemical compositions and structures make it possible to tune the properties, such as band gap, luminescence, pore size, surface area, and thermal stability. Most of the synthesis has been carried out using solvothermal reactions refs in pyrex tube or teflon lined autoclaves. Novel three-dimensional (3D) microporous chalcogenides constructed on building units [M-Sn-Q]n- (M=Zn, Cd, Mn; Q=S, Se) have been obtained. Their structures have been characterized by both single crystal and powder X-ray diffraction methods. Optical diffuse reflectance experiments have indicated that these compounds are semiconductors with intermediate band gaps between 1.5~2.9eV. The successful doping/substitution of 5%~20% Mn and Se in the [Zn-Sn-S]n- structure allows systematic tuning of the band gap and optical properties of this semiconductor compound. All compounds show a high thermal stability over 400°C. Our studies also show that the guest molecules and cations residing in the open frameworks are exchangeable. Another novel two dimentional ion sulfide [Fe(en)3]·[Fe16S20]·en compound was synthesized as well. UV-Vis reflectance spectroscopy showed a very low absorption coefficient and small band gap ~0.5eV. Doping/substitution experiments with Co and Mn replacing Fe were carried out and the properties will be discussed. In summary, this work has provided examples of rational synthesis and property tuning of new functional materials with new structure types, and demonstrated structure-property correlation in metal chalcogenide based compounds. It has provided useful information for the future developments of material synthesis with desired multifunctionality.
Note (type = degree)
Ph.D.
Note (type = bibliography)
Includes bibliographical references (p. 78-80).
Subject (ID = SUBJ1); (authority = RUETD)
Topic
Chemistry and Chemical Biology
Subject (ID = SUBJ2); (authority = ETD-LCSH)
Topic
Chalcogenides
Subject (ID = SUBJ3); (authority = ETD-LCSH)
Topic
Semiconductors
RelatedItem (type = host)
TitleInfo
Title
Graduate School - New Brunswick Electronic Theses and Dissertations
Identifier (type = local)
rucore19991600001
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http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.17243
Identifier
ETD_728
Location
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NjNbRU
Identifier (type = doi)
doi:10.7282/T3Q240KF
Genre (authority = ExL-Esploro)
ETD doctoral
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The author owns the copyright to this work.
Copyright
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Copyright protected
Availability
Status
Open
AssociatedEntity (AUTHORITY = rulib); (ID = 1)
Name
Min Wu
Role
Copyright holder
Affiliation
Rutgers University. Graduate School - New Brunswick
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Detail
Non-exclusive ETD license
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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.
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