Electronic properties and field emission of carbon nanotube films treated by hydrogen plasma |
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| Authors: | K.?Yu author-information" > author-information__contact u-icon-before" > mailto:yk@.net" title=" yk@.net" itemprop=" email" data-track=" click" data-track-action=" Email author" data-track-label=" " >Email author,Z.?Zhu,Q.?Li,W.?Lu |
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| Affiliation: | (1) Department of Electric Engineering, East China Normal University, 3663 Zhong Shan North Road, 200062 Shanghai, P.R. China;(2) State Key Laboratory for Infrared Physics, Institute of Technical Physics, Chinese Academy of Sciences, 200083 Shanghai, P.R. China;(3) School of Physics and Microelectronics, Shandong University, 250061 Jinan, P.R. China |
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| Abstract: | Large-scale and very even multi-wall carbon nanotube (MWNT) films have been obtained at room temperature by an electrophoresis deposition technique. The characterization, by means of scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy, and micro-Raman spectroscopy, shows that the MWNTs with hydrogen-plasma (HP) treatment are covered by onion-like nanolumps, and three-dimensional multiple-way-connected nanotube webs are formed. The electronic property of the treated MWNT film is converted from semiconducting to metallic. The field-emission test indicates that the HP-treated MWNT film has a low threshold of 1.1 V/ m (at 0.1 A/cm2), a high emission light spot density of about 105 cm-2, and a stable and suitable emission current. The conversion mechanism of the treated carbon nanotube structure and the reason for the change of the electronic and field-emission characteristics of the MWNT films are discussed. PACS 81.07.De; 82.33.Xj; 85.45.Db |
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