Keywords nano-amorphous carbon film;field electron emission;turn-on field;current density;emission sites density;stability;hydrogen chemisorption;Density functional theory;work function;

• 纳米非晶碳膜;场电子发射;开启电场;电流密度;发射点密度;稳定性;氢化学吸附;密度泛函理论;功函数;