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研究了Ar离子束轰击及温度对多壁碳纳米管阵列场发射性能的影响 .经Ar离子轰击 35min后 ,发现阵列顶端的Fe催化剂颗粒明显减少 ,弯曲的顶部被轰击掉 ,使碳纳米管的场发射电流明显减小而场发射像无明显改变 .温度的增加引起碳纳米管的场发射电流也随之增加 .还研究了在透明阳极技术中涂在阳极的荧光粉对场发射电流的影响 .对同一碳纳米管阵列样品 ,发现涂有荧光粉的透明阳极使测量到的场发射电流大幅度减小 ,只是未涂荧光粉阳极电流的 1 30左右 .直接用二氧化锡导电膜作阳极时 ,测得样品的开启场强为 1 0V μm .沉积了荧光粉的二氧化锡导电膜作阳极时 ,开启场强变为 2 0V μm .
The effects of Ar ion beam bombardment and temperature on the field emission properties of multi-walled carbon nanotube arrays were investigated. After Ar ion bombardment for 35 min, the size of the Fe catalyst particles at the top of the array was significantly reduced and the curved top was bombarded, The field emission current decreases obviously and the field emission image does not change obviously.The increase of temperature causes the field emission current of carbon nanotubes to increase.The influence of the phosphor coated on the anode in the transparent anode technology on the field emission current For the same carbon nanotube array sample, it was found that the transparent anodes coated with phosphor significantly reduced the measured field emission current, only about 30% of the anode current without phosphor, and the direct use of tin dioxide as the anode , The field strength of the sample was measured at 10 V μm. When the phosphor-coated tin dioxide conductive film was used as an anode, the turn-on field strength was changed to 20 V μm.