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Vertically aligned tin-doped indium oxide nanowire arrays: Epitaxial growth and electron field emission properties

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Vertically aligned tin-doped indium oxide (ITO) single-crystalline nanowire arrays are epitaxially grown on ITO/yttrium stabilized zirconia substrates by vapor transport method. Vacuum electron field emission properties of the aligned ITO nanowires are investigated. The turn-on electrical field at a current density of 1 μA/cm2 is about 2.0 Vm, and the lowest vacuum for an obvious emission is 1×10-1 Pa. The good performance of field emission is attributed to the vertically aligned morphology, which has a stronger local electric field due to their orientation parallel to the electric-field direction.

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Applied Physics Letters  (Volume:89 ,  Issue: 12 )