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Title: High-current field emission from a vertically aligned carbon nanotube field emitter array
Authors: Thong, J.T.L. 
Oon, C.H.
Eng, W.K.
Zhang, W.D.
Gan, L.M.
Issue Date: 22-Oct-2001
Citation: Thong, J.T.L., Oon, C.H., Eng, W.K., Zhang, W.D., Gan, L.M. (2001-10-22). High-current field emission from a vertically aligned carbon nanotube field emitter array. Applied Physics Letters 79 (17) : 2811-2813. ScholarBank@NUS Repository.
Abstract: Arrays of vertically aligned carbon nanotubes (CNTs) were grown on a patterned sputtered cobalt film by chemical vapor deposition from ethylenediamine at 900°C. Each square array comprises a moderate density of nanotubes with an average height of 90 μm covering a total area of 3.6 × 10-3 cm2. Field emission measurements were carried out on individual arrays at pressures below 10-8 mbar. The spacing between the anode and the top of the CNT array is 935 μm and a total current of 2 mA could be obtained at 2.5 kV. A Fowler-Nordheim plot of the I-V data shows an unusually high field enhancement factor at lower fields. At an average field strength of 1.925 V/μm, the corresponding emission current density is 130 mA/cm2. This emission current was found to be very stable, with short-term fluctuations (5 Hz measurement bandwidth) of no more than ±1.5%, while the current drifted less than 1.5% over a test period of 20 h. © 2001 American Institute of Physics.
Source Title: Applied Physics Letters
ISSN: 00036951
DOI: 10.1063/1.1412590
Appears in Collections:Staff Publications

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