It is found electrical characteristics of cathodes are affected by CNT content, and only cathode with appropriate CNT content has the optimal field emission properties.

• 实验发现,碳纳米管冷阴极的导电性和场发射特性受碳纳米管含量影响,具有适当的碳纳米管含量的冷阴极的场发射特性最佳。