Efficient field emission from structured gold nanowire cathodes
نویسندگان
چکیده
Based on last years field emission (FE) results achieved with randomly distributed free-standing gold nanowires (NW) [1], cathodes with regular arrays of Au-NW patches (50 μm diameter) were fabricated by means of a shadow mask during heavy ion irradiation of polycarbonate foils [2-3]. The number density, diameter Ø, and length L of the NW were controlled by the ion fluence f, foil etching time, and electrochemical deposition time, respectively. Various patch structures were obtained as summarized in Tab.1. The dimensions and aspect ratio AR of the Au-NW were determined from SEM images. Pyramidal clustering of the NW was observed for f > 10 cm and AR > 200.
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