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Fabrication and characterization of carbon and boron carbide nanostructured materials
Descriptive
TypeOfResource
Text
TitleInfo
(ID = T-1)
Title
Fabrication and characterization of carbon and boron carbide nanostructured materials
Identifier
ETD_2786
Identifier
(type = hdl)
http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000056731
Language
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eng
Genre
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theses
Subject
(ID = SBJ-1);
(authority = RUETD)
Topic
Materials Science and Engineering
Subject
(ID = SBJ-2);
(authority = ETD-LCSH)
Topic
Nanotubes
Subject
(ID = SBJ-3);
(authority = ETD-LCSH)
Topic
Raman spectroscopy
Subject
(ID = SBJ-4);
(authority = ETD-LCSH)
Topic
Boron compounds--Properties
Subject
(ID = SBJ-5);
(authority = ETD-LCSH)
Topic
Carbon--Biocompatibility
Subject
(ID = SBJ-6);
(authority = ETD-LCSH)
Topic
Boron compounds--Biocompatibility
Abstract
(type = abstract)
Carbon is present in nature in a variety of allotropes and chemical compounds. Due to reduced dimensionality, nanostructured carbon materials, i.e. single walled carbon nanotubes (SWNTs), are characterized by unique physical and chemical properties. There is a potential for SWNTs use as biological probes and assists for tunable tissue growth in biomedical applications. However, the presumed cytotoxicity of SWNTs requires investigation of the risks of their incorporation into living systems. Boron is not found in nature in elementary form. Boron based materials are chemically complex and exist in various polymorphic forms, i.e. boron carbide (BC). Because BC is a lightweight material with exceptional mechanical and elastic properties, it is the ideal candidate for armor and ballistic applications. However, practical use of BC as armor material is limited because of its anomalous glass-like behaviour at high velocity impacts, which has been linked to stress-induced structural instability in one of BC polymorphs, B12(CCC). Theoretical calculations suggest that formation of B12(CCC) in BC could be suppressed by silicon doping. In the first part of this thesis, biocompatibility of SWNTs is investigated. It is shown that under normal cell implantation conditions, the electrical conductivity of the SWNTs decreases due to an increase in structural disorder. This research suggests that SWNTs can be functionalized by protein and biological cells reducing the risk of cytotoxicity. In the second part of this thesis, boron carbide nanostructured materials are synthesized and investigated. Radio frequency sputtering deposition technique is employed for fabrication of BC (Si free) and BC:Si thin films. Variation of plasma conditions and temperature are found to affect chemical composition, adhesion to the substrate and morphology of the films. It is shown that BC films are predominantly amorphous and a small addition of Si largely improves their mechanical properties. In addition, nanostructured BC compounds are fabricated by arc discharge technique using graphite or boron carbide electrodes submerged in liquid nitrogen, de-ionised water, or argon gas. Microscopic and spectroscopic investigation of the synthesized material confirms formation of various BC and carbon nanostructures. Specifically, arc discharge initiated in inert environment by applying low current leads to the formation of nanostructured BC without contaminants.
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electronic resource
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xix, 134 p. : ill.
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Note
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Ph.D.
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Includes bibliographical references
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Includes vita
Note
(type = statement of responsibility)
by Sara Reynaud
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Reynaud
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Sara
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1981-
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author
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Sara Reynaud
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Manish
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chair
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Manish Chhowalla
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KLEIN
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LISA C
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Advisory Committee
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LISA C KLEIN
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Mann
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Adrian B
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Adrian B Mann
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Iqbal
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Zafar
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Advisory Committee
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Zafar Iqbal
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Rutgers University
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degree grantor
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Graduate School - New Brunswick
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school
OriginInfo
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2010
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2010-10
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xx
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Title
Rutgers University Electronic Theses and Dissertations
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ETD
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Title
Graduate School - New Brunswick Electronic Theses and Dissertations
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rucore19991600001
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NjNbRU
Identifier
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doi:10.7282/T3Z31ZCQ
Genre
(authority = ExL-Esploro)
ETD doctoral
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Rights
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The author owns the copyright to this work.
Copyright
Status
Copyright protected
Availability
Status
Open
Reason
Permission or license
RightsHolder
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Name
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Reynaud
GivenName
Sara
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DateTime
2010-07-22 01:54:44
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Sara Reynaud
Affiliation
Rutgers University. Graduate School - New Brunswick
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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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ETD
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