Change of surface morphology and field emission property of carbon nanotube films treated using a hydrogen plasma
作者： Ke Yu , Ziqiang Zhu , Yongsheng Zhang , Qiong Li , Weiming Wang
DOI: 10.1016/J.APSUSC.2003.10.029
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摘要: Abstract Large-scaled homogeneous multi-wall carbon nanotube (MWNT) films have been obtained at room temperature by a transfer technique. The surface morphology and microstructure features of the before after hydrogen plasma (HP) treatment were investigated scanning electron microscopy, high-resolution transmission micro-Raman spectra. electrical resistance in range 5–296 K field emission diode structure for MWNT examined. Electron microscopy results demonstrated that treated nanotubes had become open palpus-like graphite layers or covered onion-like nanoparticles. dependence on electric films, which was fitted three-dimensional variable hopping conduction, observed; slope scope film larger than untreated one. tests indicated turn-on (at 0.1 μA/cm 2 ) decreases from 3.9 to 1.5 V/μm sample is with 30 min. High spot density about 1.5×10 4 cm −2 achieved an applied 5.2 V/μm. conversion mechanism nanotubes(CNTs) reason change electronic properties discussed.
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