Simple method to rapidly fabricate chain-like carbon nanotube films and its field emission properties

Zhi-yuan Wu,Shuang-qi Hu,and Zhi-qian Wang Chemical Industry and Ecology Institute,North University of China,Taiyuan 030051,China

摘 要：A simple process to fabricate chain-like carbon nanotube（CNT） 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 V/μm 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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