Self-aligned growth of carbon nanotubes and its application to field emitter array

为了设计高效的碳纳米管场发射阵列，研究了碳纳米管柱阵列的几何形状对其场发射性能的影响。在这里，研究了场发射特性(开启电压和发射点分布)与柱距和形状的关系。结果表明，采用自对准碳纳米管生长工艺制备的柱子形状由正方形变为“山形”，改善了有限元性能。这是由于生长形态分散，降低了山形柱顶的场屏蔽效应。

The influence of geometry of a carbon nanotube(CNT) pillar array on its field-emission properties was investigated for the purpose of designing a high-efficiency CNT field-emitter array. Here the dependence of the field-emission(FE) properties(turn-on voltage and emission site distribution) on the pillar pitch and the shape was examined. Our results showed that the change of the pillar shape from a square shape to a"mountain shape", which was fabricated by the self-aligned CNT growth process, improved the FE properties. This improvement is due to the dispersed growth morphology, which reduces the field-screening effect at the top of the mountain-shaped pillars.