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標題: Angle-Resolved Field Emission of Individual Carbon Nanotubes
作者: Lee, M.W.
Lai, W.C.
Kao, Y.Y.
Hsieh, T.L.
Huang, K.J.
關鍵字: chemical-vapor-deposition
ray tube
期刊/報告no:: Japanese Journal of Applied Physics, Volume 48, Issue 7.
摘要: Individual multiwalled carbon nanotube (CNT) emitters were fabricated on a Si substrate by electron-beam lithography. The CNT emitter had seven anodes with orientation theta ranging from 0-60 degrees with respect to the CNT axis. Field-emission experiments revealed that the emission current l was largest along the theta = 0 degrees direction and decreased monotonically with increasing theta; at theta = 56 degrees l decreased to one-thirtieth of its value at 0 degrees. The emission surface area also decreased by four orders of magnitude as theta increased from 0 to 56 degrees. In contrast, the field enhancement factor increased by a factor of five in the same angular range. It was found that 80% of the emission current was contained within 20, from the CNT axis. The results indicate that a CNT emits electrons most effectively along its CNT axis. (C) 2009 The Japan Society of Applied Physics DOI: 10.1143/JJAP.48.072402
ISSN: 0021-4922
Appears in Collections:奈米科學研究所



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