Abstract
Both diamond and carbon nanotubes are efficient field emitters because of the negative electron affinity associated with the diamond surface and the geometrically nanometer-scale nature of the nanotubes. They offer the important advantage of ease in fabrication and low-cost manufacturing. Both materials have been shown to emit electrons at very low electric fields (3–7 V/μm for a current density of 10 mA/cm 2). Moreover, nanotube emitters are found to be able to deliver very high emission currents densities, with current density routinely exceeding 1 A/cm 2. The low field operation of these carbon based emitters is attractive for display applications, while the high current capability of nanotube emitters will enable a number of high power, high frequency devices. Further improvements over the emission uniformity hold the key for the realization of the potential of these carbon materials in enabling practically useful cold cathode devices.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
