Enhanced Cold Cathode Electron Emission from ZnO Nanostructure Attached Amorphous Carbon Nanotubes
Amorphous carbon nanotubes (aCNTs) were produced by simple low temperature synthesis technique. In this synthesis technique a chemical reaction occurs between ferrocene and ammonium chloride at a temperature ~250 °C in an air furnace. Flower like zinc oxide (ZnO) nanostructure were attached with the aCNTs. The as synthesized samples were characterized by X-ray diffraction (XRD), field emission scanning electron microscope (FESEM) and high resolution transmission electron microscope (HRTEM). ZnO-aCNT hybrid nanostructure exhibited enhanced field emission properties with a turn-on field as low as 2.6 V/μm. The improvement of the field emission property may be attributed to the high enhancement factor and increased roughness of the hybrid sample.