Growth and field-emission properties of vertically aligned cobalt nanowire arrays
(2004) Nano Letters : a journal dedicated to nanoscience and nanotechnology — Vol. 4, n° 3, p. 521-524 (2004)
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- Abstract
- We present the fabrication of vertically aligned cobalt nanowire arrays on planar surfaces as well as preliminary field-emission (FE) experiments using them as cold electron cathodes. These arrays are obtained by electrodeposition into nanoporous templates on Au/Ti/Si substrates at very low temperature (<100 degreesC). After the removal of the template, the arrays consist of statistically positioned vertical free-standing nanowires with high aspect ratios, uniform dimensions, and predetermined densities. The electron field-emission measurements show metallic and reproducible characteristics. Emission is found to be reasonably homogeneous over the whole sample area, and a current density of 1 mA/cm(2) has been obtained. We show that the growth process permits us to predetermine the field amplification factor precisely, which is of primary importance for FE sources, A large variety of FE applications can be envisaged, including FE displays and microwave amplifiers.
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Vila, L., Legras, R., Vincent, P., Dauginet-De Pra, L., Pirio, G., Minoux, E., Gangloff, L., Demoustier, S., Sarazin, N., Ferain, E., Piraux, L., & Legagneux, P. (2004). Growth and field-emission properties of vertically aligned cobalt nanowire arrays. Nano Letters : a journal dedicated to nanoscience and nanotechnology, 4(3), 521-524. https://doi.org/10.1021/nl0499239 (Original work published 2004)