The Resource The bulk and interfacial electronic and chemical structure of amorphous hydrogenated boron carbide, Marcus Sky Driver

The bulk and interfacial electronic and chemical structure of amorphous hydrogenated boron carbide, Marcus Sky Driver

Label
The bulk and interfacial electronic and chemical structure of amorphous hydrogenated boron carbide
Title
The bulk and interfacial electronic and chemical structure of amorphous hydrogenated boron carbide
Statement of responsibility
Marcus Sky Driver
Creator
Contributor
Author
Subject
Genre
Language
eng
Summary
The chemical and electronic structure, as related to the surface, interface and bulk of amorphous hydrogenated boron carbide (a-BxC:Hy), is of interest in neutron detection and microelectronics. This dissertation investigates the chemical and electronic structure of semiconducting thin-film a-BxC:Hy grown by plasma enhanced chemical vapor deposition (PECVD) of ortho-carborane (1,2-C2B10H12). Experimental methods used include: x-ray and ultraviolet photoelectron spectroscopies (XPS/UPS) and x-ray absorption/emission spectroscopies (XAS/XES). These methods were used to investigate the chemical species, bonding and hybridizations, and band gaps of a-BxC:Hy prepared or treated under varying conditions. Additionally, a detailed examination of the formation of Schottky barriers was implemented. Throughout this dissertation the chemical structure was studied. One study was to understand various growth conditions. The effects of the PECVD growth parameters were evaluated by comparing changes in atomic percentages (at.%'s) between thin-films from various substrate temperatures. Additionally, detailed studies of the photoelectron core level under two different growth conditions were undertaken to evaluate the effects of pre-/post- argon ion etching (Ar+) for the following: the chemical structural change for both an as grown (AG) and in-situ thermal treatment (500°C), and post Ar+ etch of samples thermally treated ranging from as grown to 850°C. The as grown and in-situ treated samples were used in conjunction to determine the formation of the Schottky barrier. The electronic structure was determined by the changes within the valence band of the thermally treated samples and formation of Schottky barrier. Thermally treated samples (as grown to 850°C) were further evaluated with respect to their occupied and unoccupied electronic states. The atomic percentage gave a stoichiometry range for a-BxC:Hy (given as x=1.5 to 3.0 with y= decreases with thermal treatment and Oz: z= 0.2 to 0.5). Studies of films with respect to thermal treatment reveal two discrete state changes that occur at 400°C and 850°C. These changes are due to segregation of carbon and oxygen by the reorganization of the hydrocarbon chains between icosahedra. Additionally, the Schottky barrier study indicates that a clean surface was necessary before deposition of an ohmic contact and from the metals studied. Such studies are important to applications for high temperature thermoelectric converters, high-efficiency direct-conversion solid-state neutron detectors and microelectronics
http://bibfra.me/vocab/relation/advisor
mRVOBywUgXw
Cataloging source
UMK
http://library.link/vocab/creatorName
Driver, Marcus Sky
Degree
Ph.D.
Dissertation note
(Department of Physics and astronomy and Department of Chemistry).
Dissertation year
2013.
Granting institution
University of Missouri-Kansas City,
Illustrations
illustrations
Index
no index present
Literary form
non fiction
Nature of contents
  • dictionaries
  • bibliography
  • theses
http://library.link/vocab/relatedWorkOrContributorName
Caruso, Anthony N.
http://library.link/vocab/subjectName
  • Carbon
  • Amorphous substances
  • Boron
Label
The bulk and interfacial electronic and chemical structure of amorphous hydrogenated boron carbide, Marcus Sky Driver
Instantiates
Publication
Note
  • "A dissertation in Physics and Chemistry."
  • Advisor: Anthony Caruso
  • Vita
Antecedent source
not applicable
Bibliography note
References at the end of each chapter
Carrier category
online resource
Carrier category code
  • cr
Carrier MARC source
rdacarrier.
Color
black and white
Content category
text
Content type code
  • txt
Content type MARC source
rdacontent.
Contents
Abstract -- List of illustrations -- List of tables -- List of equations -- Acknowledgments -- Introduction and background -- Experimental theory and methods -- Understanding the chemical and electronic structure of a-BXC:HY thin-films using photoemission -- The effects of thermal treatment on amorphous hydrogenated boron carbide: a study of the bulk chemical and electronic structure -- Metal-To-Boron carbide interface: implications for Schottky Barrier Heights -- Summary and future work -- Appendix
Control code
904728810
Dimensions
unknown
Extent
1 online resource (228 pages)
File format
one file format
Form of item
online
Level of compression
mixed
Media category
computer
Media MARC source
rdamedia.
Media type code
  • c
Other physical details
illustrations (some color)
Quality assurance targets
not applicable
Specific material designation
remote
System control number
(OCoLC)904728810
System details
  • The full text of the dissertation is available as an Adobe Acrobat .pdf file; Adobe Acrobat Reader required to view the file
  • Mode of access: World Wide Web
Label
The bulk and interfacial electronic and chemical structure of amorphous hydrogenated boron carbide, Marcus Sky Driver
Publication
Note
  • "A dissertation in Physics and Chemistry."
  • Advisor: Anthony Caruso
  • Vita
Antecedent source
not applicable
Bibliography note
References at the end of each chapter
Carrier category
online resource
Carrier category code
  • cr
Carrier MARC source
rdacarrier.
Color
black and white
Content category
text
Content type code
  • txt
Content type MARC source
rdacontent.
Contents
Abstract -- List of illustrations -- List of tables -- List of equations -- Acknowledgments -- Introduction and background -- Experimental theory and methods -- Understanding the chemical and electronic structure of a-BXC:HY thin-films using photoemission -- The effects of thermal treatment on amorphous hydrogenated boron carbide: a study of the bulk chemical and electronic structure -- Metal-To-Boron carbide interface: implications for Schottky Barrier Heights -- Summary and future work -- Appendix
Control code
904728810
Dimensions
unknown
Extent
1 online resource (228 pages)
File format
one file format
Form of item
online
Level of compression
mixed
Media category
computer
Media MARC source
rdamedia.
Media type code
  • c
Other physical details
illustrations (some color)
Quality assurance targets
not applicable
Specific material designation
remote
System control number
(OCoLC)904728810
System details
  • The full text of the dissertation is available as an Adobe Acrobat .pdf file; Adobe Acrobat Reader required to view the file
  • Mode of access: World Wide Web

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