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利用场发射显微镜在小于 4 0× 10 - 7Pa压强条件下研究了单壁碳纳米管微束在不同温度加热除气后的场发射变化 ,得出随着除气温度的升高 ,碳纳米管逸出功经历了从大到小再变大的变化过程 .在清洁态 (10 0 0℃除气 )对应有最小的逸出功 ,此时场发射图像显示出一定的细致结构 .继续升高温度 ,碳纳米管发生塌缩 .
Field emission microscopy was used to study the field emission after single - walled carbon nanotube micro - bundle was heated at different temperatures with the pressure less than 400 × 10 - 7Pa. It was found that with the increase of outgassing temperature, the carbon nanotubes The work of power has experienced a process of change from large to small, which shows that there is a minimum of work function in the clean state (degassing at 100 ° C). At this time, the field emission image shows a certain fine structure. Temperature, carbon nanotubes collapsed.