The authors report on the field emission from an aligned carbon nanotube (CNT) bundle grown by thermal chemical vapor deposition. The CNT bundle showed a low-threshold electric field of 2.0 V/μm that produced a current density of 10 mA/cm~2, sustainable evolution of current density up to 2.8 A/cm~2 at 2.9 V/μm, and good emission stability without degradation for 200 h of continuous dc emission. By calculating the electric-field distribution, it was found that the electric field was significantly higher at the edge of the CNT bundle than at the center. The excellent field-emission properties of the aligned CNT bundle were attributed to the edge effect and the high-density structure.
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机译：作者报告了通过热化学气相沉积生长的取向碳纳米管（CNT）束的场发射。 CNT束显示2.0 V /μm的低阈值电场，产生10 mA / cm〜2的电流密度，在2.9 V /μm时电流密度可持续发展到2.8 A / cm〜2，并且发射良好连续200小时连续直流发射不会降低的稳定性。通过计算电场分布，发现在CNT束的边缘处的电场显着高于在中心处的电场。对准的CNT束的优异的场发射特性归因于边缘效应和高密度结构。
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Division of Electrical, Electronic and Information Engineering, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan;
