Simple method to rapidly fabricate chain-like carbon nanotube films and its field emission properties |
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Authors: | Zhi-yuan Wu Shuang-qi Hu Zhi-qian Wang |
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Affiliation: | Zhi-yuan Wu,Shuang-qi Hu,and Zhi-qian Wang Chemical Industry and Ecology Institute,North University of China,Taiyuan 030051,China |
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Abstract: | A simple process to fabricate chain-like carbon nanotube (COT) films by microwave plasma-enhanced chemical vapor deposition (MPCVD) was developed successfully. Prior to deposition, the Ti/Al2O3 substrates were ground with Fe-doped SiO2 powder. The nano-structure of the deposited films was analyzed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Raman spectroscopy. The field electron emission characteristics of the chain-like carbon nanotube films were measured under the vacuum of 10-5 Pa. The low turn-on field of 0.80 V/μm and the emission current density of 8.5 mA/cm2 at the electric field of 3.0 Vμ/m are obtained. Based on the above results, chain-like carbon nanotube films probably have important applications in cold cathode materials and electrode materials. |
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Keywords: | carbon nanotube (CNT) chain-like film microwave plasma-enhanced chemical vapor deposition (MPCVD) field emission |
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