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Field Emission Properties of Carbon Nanotube Fibers and Sheets for a High Current Electron Source

Christy, Larry A
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1406819279

Abstract Details

2014, MS, University of Cincinnati, Engineering and Applied Science: Electrical Engineering.
Field emission (FE) properties of carbon nanotube (CNT) fibers from Rice University and the University of Cambridge have been studied for use within a high current electron source for a directed energy weapon. Upon reviewing the performance of these two prevalent CNT fibers, cathodes were designed with CNT fibers from the University of Cincinnati Nanoworld Laboratory. Cathodes composed of a single CNT fiber, an array of three CNT fibers, and a nonwoven CNT sheet were investigated for FE properties; the goal was to design a cathode with emission current in excess of 10 mA. Once the design phase was complete, the cathode samples were fabricated, characterized, and then analyzed to determine FE properties. Electrical conductivity of the CNT fibers was characterized with a 4-probe technique. FE characteristics were measured in an ultra-high vacuum chamber at Wright-Patterson Air Force Base. The arrayed CNT fiber and the enhanced nonwoven CNT sheet emitter design demonstrated the most promising FE properties. Future work will include further analysis and cathode design using this nonwoven CNT sheet material to increase peak current performance during electron emission.
Marc Cahay, Ph.D. (Committee Chair)
Punit Boolchand, Ph.D. (Committee Member)
Altan Ferendeci, Ph.D. (Committee Member)
79 p.
Electrical Engineering
Carbon Nanotubes; Field Emission; CNT nonwoven sheet; CNT Fiber; High Current Cathode; High Current Electron source

Recommended Citations

Citations

  • Christy, L. A. (2014). Field Emission Properties of Carbon Nanotube Fibers and Sheets for a High Current Electron Source [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1406819279

    APA Style (7th edition)

  • Christy, Larry. Field Emission Properties of Carbon Nanotube Fibers and Sheets for a High Current Electron Source. 2014. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1406819279.

    MLA Style (8th edition)

  • Christy, Larry. "Field Emission Properties of Carbon Nanotube Fibers and Sheets for a High Current Electron Source." Master's thesis, University of Cincinnati, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1406819279

    Chicago Manual of Style (17th edition)

ucin1406819279
660
© 2014, some rights reserved.Creative Commons License Field Emission Properties of Carbon Nanotube Fibers and Sheets for a High Current Electron Source by Larry A Christy is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by University of Cincinnati and OhioLINK.