Enhanced Field Emission of ZnO Nanowires


  • The work performed by S. H. Jo and Z. F. Ren is supported by DOE under grant DE-FG02-00ER45805, and the work done by D. Banerjee is supported by the US Army Natick Soldier Systems Center under grant DAAD16-03-C-0052.


original image

Enhanced field emission from ZnO nanowires grown on carbon cloth (see Figure) has been measured. These emitters produced a field emission current density of 1 mA cm–2 at about 0.7 V μm–1, corresponding to an exceptionally high field-enhancement factor of 4.11 × 104. Such an extremely high field-enhancement factor is believed to be the combined effect of the high aspect ratio of ZnO nanowires and the geometry of the carbon-cloth substrate.