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The fabrication of carbon-nanotube-coated electrodes and a field-emission-based luminescent device

机译：碳纳米管涂层电极的制造和基于场发射的发光器件

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摘要

Tungsten substrates were coated with an Ni or Ni-Co catalyst by the electroless dip coating technique. Various carbon nanotubes were synthesized by the catalytic chemical vapor deposition (CVD) method under different growth conditions. It was observed that Ni-and Ni-Co-coated tungsten substrates give very good growth of carbon nanotubes (CNT) in terms of yield, uniformity and alignment at a growth temperature of 600 degrees C. We fabricated a field-emission-based luminescent light bulb where a tungsten wire coated with carbon nanotubes served as a cathode. Results show lower threshold voltage, better emission stability and higher luminescence for CNT cathodes in comparison with uncoated tungsten cathodes. We found that aligned-coiled carbon nanotubes are superior to straight CNTs in terms of field emission characteristics and luminescence properties.
机译：通过化学浸涂技术，用Ni或Ni-Co催化剂涂覆钨基材。通过催化化学气相沉积（CVD）方法在不同的生长条件下合成了各种碳纳米管。观察到，在生长温度为600℃时，Ni和Ni-Co涂覆的钨衬底在产率，均匀性和对准性方面都能很好地生长碳纳米管（CNT）。我们制造了基于场发射的发光材料涂有碳纳米管的钨丝作为阴极的灯泡。结果表明，与未涂覆的钨阴极相比，CNT阴极的阈值电压更低，发射稳定性更好，发光度更高。我们发现，在场发射特性和发光特性方面，排列成卷的碳纳米管优于直链CNT。

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