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Title page for ETD etd-10232011-200039


Type of Document Dissertation
Author Wade, Travis Charles
URN etd-10232011-200039
Title TEM Study of Nanostructured Cold Cathode Diamond Field Emitter Tips
Degree PhD
Department Interdisciplinary Materials Science
Advisory Committee
Advisor Name Title
Jim Davidson Committee Co-Chair
Norman Tolk Committee Co-Chair
Charles Lukehart Committee Member
Greg Walker Committee Member
Kalman Varga Committee Member
Weng P Kang Committee Member
Keywords
  • CVD
  • field emission
  • nanostructured
  • nanoscience
  • cold cathode
  • FIB
  • diamond
  • TEM
Date of Defense 2011-10-20
Availability unrestricted
Abstract
This dissertation furthers the understanding of diamond as a material for cold cathode field emission. Although diamond has proven to be an excellent emitter with orders of magnitude more current at lower fields than competing technologies, fabrication yield has been a persistent issue. Irregularities in emission behavior between tips have historically been attributed to anomalies in the fabrication process which results in “sharp” or “less sharp” diamond tips. However, differences are observed in electron emission thresholds even between tips that appear by conventional analysis to be equally well formed. By enabling analysis of the emitter surface and sub-surface, the methods developed herein permit analysis of diamond tip growth and provide a feedback mechanism for optimization of field emitter properties. This dissertation contains first-time measurements of sharp-tipped diamond cold cathode field emitters imaged by transmission electron microscopy. These preliminary observations correlate hitherto unknown diamond cold cathode emitter nanostructure with emission behavior.
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