Field emission and lifetime characteristics of carbon nanotube paste including nitrogen foaming agent

We added azodicarbamide (ADC) to protect carbon nanotube (CNT) paste from degradation. The agent produces nitrogen gas by heat at 190-210. Nitrogen (N/sub 2/) acts as the anti-oxidation gas for CNT. The measurement of field emission carried out using a diode structure showed that the electron emission of the agent-added CNT films uniformly had a field of 5.49 V//spl mu/m at a current density of 100 /spl mu/m/cm/sup 2/ (1/500 duty). Furthermore, the lifetime of CNT samples was about five times as much as that of the pristine ones.