Abstract
Carbon nanotube (CNT) films were grown on silicon wafers with and without a nickel layer (Si-CNT and Ni-CNT) via the pyrolysis of iron phthalocyanine. The nickel layer was prepared using the electroless plating method. To study the emission stability of Si-CNT and Ni-CNT cathodes during intense pulsed emission, emission characteristics were measured repeatedly with a diode structure using a Marx generator as a voltage source. For the peak values of the pulsed voltage, which were in the range between 1.62–1.66 MV (corresponding to electric field intensities between 11.57–11.85 V/μm), the first cycle emission current was 109.4 A for Si-CNT and 180.5 A for Ni-CNT. By comparing the normalized emission currents of the Si-CNT and Ni-CNT cathodes, the improvement in the emission stability can be easily quantified. The number of emission cycles necessary for the peak current to decay from 100% to 50% increased from ∼3 for Si-CNT to ∼11 for a Ni-CNT film.
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Iijima S. Helical microtubes of graphitic carbon. Nature, 1991, 354: 56–58
De Heer W A, Chatelain A, Ugarte D. A carbon nanotube field emission electron source. Science, 1995, 270: 1179–1180
Bonard J M, Croci M, Klinke C, et al. Carbon nanotube films as electron field emitters. Carbon, 2002, 40: 1715–1728
de Jonge N, Bonard J M. Carbon nanotube electron sources and applications. Philos Trans R Soc London A, 2004, 362: 2239–2266
de Jonge N, Lamy Y, Schoots K, et al. High brightness electron beam from a multi-walled carbon nanotube. Nature, 2002, 420: 393–395
Teo K B K, Chhowalla M, Amaratunga G A J, et al. Fabrication and electrical characteristics of carbon nanotube-based microcathodes for use in a parallel electron-beam lithography system. J Vac Sci Technol B, 2003, 21: 693–697
Cheng Y, Zhang J, Lee Y Z, et al. Dynamic radiography using a carbonnanotube-based field-emission x-ray source. Rev Sci Instrum, 2004, 75: 3264–3267
Choi W B, Chung D S, Kang J H, et al. Fully sealed, high-brightness carbon-nanotube field-emission display. Appl Phys Lett, 1999, 75: 3129–3131
Teo K B K, Minoux E, Hudanski L, et al. Microwave devices: Carbon nanotubes as cold cathodes. Nature, 2005, 437: 968
Li D C, Dai L M, Huang S M, et al. Structure and growth of aligned carbon nanotube films by pyrolysis. Chem Phys Lett, 2000, 316: 349–355
Weon B M, Je J H. Time-dependent current-voltage relation in electron guns. J Appl Phys, 2005, 97: 036101
Dong C, Gupta M C. Influences of the surface reactions on the field emission from multiwall carbon nano-tubes. Appl Phys Lett, 2003, 83: 159–161
Nilsson L, Groening O, Groening P, et al. Collective emission degradation behavior of carbon nanotube thin-film electron emitters. Appl Phys Lett, 2001, 79: 1036–1038
Rao A M, Jacques D, Haddon R C, et al. In situ-grown carbon nanotube array with excellent field emission characteristics. Appl Phys Lett, 2000, 76: 3813–3815
Jo S H, Tu Y, Huang Z P, et al. Correlation of field emission and surface microstructure of vertically aligned carbon nanotubes. Appl Phys Lett, 2004, 84: 413–415
Cheng Y, Zhou O. Electron field emission from carbon nanotubes. CR Phys, 2003, 4: 1021–1033
Choi J H, Choi S H, Han J H, et al. Enhanced electron emission from carbon nanotubes through density control using in situ plasma treatment of catalyst metal. J Appl Phys, 2003, 94: 487–490
Kong B Y, Seon J Y, Lee S H, et al. Density control of highly populated carbon nanotubes grown by thermal chemical vapor deposition to improve their field emission characteristics. J Korean Phys Soc, 2004, 45: 1580–1583
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Zeng, F., Li, X., Liu, W. et al. Improvement in the intense pulsed emission stability of grown CNT films via an electroless plated Ni layer. Chin. Sci. Bull. 56, 2379–2382 (2011). https://doi.org/10.1007/s11434-011-4567-z
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DOI: https://doi.org/10.1007/s11434-011-4567-z