Serbun, P. ; Jordan, F. ; Navitski, A. ; Müller, G. ; Alber, I. ; Toimil-Molares, M. E. ; Trautmann, C. (2012)
Copper nanocones grown in polymer ion-track membranes as field emitters.
In: The European Physical Journal Applied Physics, 58 (1)
doi: 10.1051/epjap/2012110473
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Field emission (FE) properties of unstructured and patch-structured cathodes with randomly distributed and vertically aligned copper nanocones (Cu-NCs) are reported. The cones of ~28 μm height, 2.4 μm base diameter and 95–220 nm tip radius were fabricated by electrochemical deposition of Cu into conical channels of heavy-ion-irradiated and asymmetrically etched polycarbonate membranes. FE measurements of the unstructured cathodes with slowly-grown Cu-NCs of high number density (107 cm−2) and excellent mechanical stability yield stable currents up to 280 μA from an emission spot of 30 μm. For the structured cathodes with a triangular patch array of less dense Cu-NCs (<106 cm−2), well-aligned FE with ~90% efficiency is reproducibly achieved. A trade-off between low onset field (~22 V/μm) for sparsely grown Cu-NCs with sharp tips and high current limit (~100 μA) for densely grown ones with broader tips is observed. Possibilities for further optimization of such field emitters for cold cathode applications are discussed.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2012 |
| Autor(en): | Serbun, P. ; Jordan, F. ; Navitski, A. ; Müller, G. ; Alber, I. ; Toimil-Molares, M. E. ; Trautmann, C. |
| Art des Eintrags: | Bibliographie |
| Titel: | Copper nanocones grown in polymer ion-track membranes as field emitters |
| Sprache: | Englisch |
| Publikationsjahr: | April 2012 |
| Verlag: | EDP Sciences |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | The European Physical Journal Applied Physics |
| Jahrgang/Volume einer Zeitschrift: | 58 |
| (Heft-)Nummer: | 1 |
| DOI: | 10.1051/epjap/2012110473 |
| Kurzbeschreibung (Abstract): | Field emission (FE) properties of unstructured and patch-structured cathodes with randomly distributed and vertically aligned copper nanocones (Cu-NCs) are reported. The cones of ~28 μm height, 2.4 μm base diameter and 95–220 nm tip radius were fabricated by electrochemical deposition of Cu into conical channels of heavy-ion-irradiated and asymmetrically etched polycarbonate membranes. FE measurements of the unstructured cathodes with slowly-grown Cu-NCs of high number density (107 cm−2) and excellent mechanical stability yield stable currents up to 280 μA from an emission spot of 30 μm. For the structured cathodes with a triangular patch array of less dense Cu-NCs (<106 cm−2), well-aligned FE with ~90% efficiency is reproducibly achieved. A trade-off between low onset field (~22 V/μm) for sparsely grown Cu-NCs with sharp tips and high current limit (~100 μA) for densely grown ones with broader tips is observed. Possibilities for further optimization of such field emitters for cold cathode applications are discussed. |
| Zusätzliche Informationen: | Artikel-ID: 10402 |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Ionenstrahlmodifizierte Materialien |
| Hinterlegungsdatum: | 19 Mär 2024 07:08 |
| Letzte Änderung: | 19 Mär 2024 07:08 |
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