Field emission properties of carbon nanotubes grown on Co/TiN coated Ta substrate for cathode in microwave power amplifier

For field emitters as a cathode of traveling wave tube–microwave power amplifiers (TWT–MPA), field-emission (FE) properties of in situ grown carbon nanotubes (CNTs) onto electrically conducting substrate were systematically characterized. CNTs grown on the Co/TiN coated Ta substrate with properly co...

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Veröffentlicht in:	Diamond and related materials 2004-04, Vol.13 (4), p.987-993
Hauptverfasser:	Han, Jae-Hee, Lee, Tae Young, Kim, Do Yoon, Yoo, Ji-Beom, Park, Chong-Yun, Choi, Jin Ju, Jung, Taewon, Han, In Taek, Kim, J.M.
Format:	Artikel
Sprache:	eng
Schlagworte:	Carbon nanotube Condensed matter: electronic structure, electrical, magnetic, and optical properties Cross-disciplinary physics: materials science rheology Electron and ion emission by liquids and solids impact phenomena Exact sciences and technology Field emission, ionization, evaporation, and desorption High emission current Materials science Nanoscale materials and structures: fabrication and characterization Nanotubes Physics TiN
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Beschreibung
Zusammenfassung:	For field emitters as a cathode of traveling wave tube–microwave power amplifiers (TWT–MPA), field-emission (FE) properties of in situ grown carbon nanotubes (CNTs) onto electrically conducting substrate were systematically characterized. CNTs grown on the Co/TiN coated Ta substrate with properly controlled process exhibited the best FE property. The maximum current density and corresponding total emission current were 3.5 mA/cm 2 and ∼1.7 mA at 21.6 V/μm, respectively. Details on the correlation between the FE properties and the morphological parameters will be discussed.
ISSN:	0925-9635 1879-0062
DOI:	10.1016/j.diamond.2003.11.014