Growth and field-emission properties of vertically aligned cobalt nanowire arrays
作者： Laurent Vila , Pascal Vincent , Laurence Dauginet-De Pra , Gilles Pirio , Eric Minoux
DOI: 10.1021/NL0499239
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摘要: We present the fabrication of vertically aligned cobalt nanowire arrays on planar surfaces as well preliminary field-emission (FE) experiments using them cold electron cathodes. These are obtained by electrodeposition into nanoporous templates Au/Ti/Si substrates at very low temperature (<100 degreesC). After removal template, consist statistically positioned vertical free-standing nanowires with high aspect ratios, uniform dimensions, and predetermined densities. The measurements show metallic reproducible characteristics. Emission is found to be reasonably homogeneous over whole sample area, a current density 1 mA/cm(2) has been obtained. that growth process permits us predetermine field amplification factor precisely, which primary importance for FE sources, A large variety applications can envisaged, including displays microwave amplifiers.
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