High stability cathode for carbon nanotube field emission display

The new composites of carbon nanotube with silicon dioxide (SiO/sub 2/) nanoparticle for FED cathode is studied. It has significantly improved emission current density property and stable emission characterization of cathode, because it has higher enhancement factor and less shield-effect by adjusting silicon nanoparticle content. The results indicated that when about 80 wt% CNT is optimum content, the current density at the electric field 2 V//spl mu/m is 56 mA/mm/sup 2/, the turn-on field of the CNTs cathode was about 0.71 V//spl mu/m. The fluctuation of emission current is less than 3% for three hours.