Li, Wenshan ; Pyatkov, Feliks ; Dehm, Simone ; Flavel, Benjamin S. ; Krupke, Ralph (2014)
Deposition of semiconducting single-walled carbon nanotubes using light-assisted dielectrophoresis.
In: physica status solidi (b), 251 (12)
doi: 10.1002/pssb.201451280
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Dielectrophoresis (DEP) is an established method for the integration of solution-processed single-walled carbon nanotubes into nanoscale device structures. However, this method is less effective for small-diameter semiconducting nanotubes and leads to an enrichment of metallic tubes in multi-tube devices. In this work, we present the first results of a novel light-assisted DEP technique, which enhances the deposition of (6,5) semiconducting carbon nanotubes. Transistors fabricated with this technique show higher on/off ratios compared to transistors that were fabricated by conventional DEP. We explain this effect by an enhanced polarizability of the irradiated semiconducting nanotubes and discuss spontaneous and field-driven exciton dissociation as the underlying mechanism. Strategies to further improve the effect are also proposed.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2014 |
| Autor(en): | Li, Wenshan ; Pyatkov, Feliks ; Dehm, Simone ; Flavel, Benjamin S. ; Krupke, Ralph |
| Art des Eintrags: | Bibliographie |
| Titel: | Deposition of semiconducting single-walled carbon nanotubes using light-assisted dielectrophoresis |
| Sprache: | Englisch |
| Publikationsjahr: | Dezember 2014 |
| Verlag: | WILEY-VCH Verlag GmbH & Co. KGaA |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | physica status solidi (b) |
| Jahrgang/Volume einer Zeitschrift: | 251 |
| (Heft-)Nummer: | 12 |
| DOI: | 10.1002/pssb.201451280 |
| Kurzbeschreibung (Abstract): | Dielectrophoresis (DEP) is an established method for the integration of solution-processed single-walled carbon nanotubes into nanoscale device structures. However, this method is less effective for small-diameter semiconducting nanotubes and leads to an enrichment of metallic tubes in multi-tube devices. In this work, we present the first results of a novel light-assisted DEP technique, which enhances the deposition of (6,5) semiconducting carbon nanotubes. Transistors fabricated with this technique show higher on/off ratios compared to transistors that were fabricated by conventional DEP. We explain this effect by an enhanced polarizability of the irradiated semiconducting nanotubes and discuss spontaneous and field-driven exciton dissociation as the underlying mechanism. Strategies to further improve the effect are also proposed. |
| Freie Schlagworte: | dielectrophoresis, exciton dissociation, nanotube, polarizability |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Molekulare Nanostrukturen 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 08 Jan 2015 12:12 |
| Letzte Änderung: | 08 Jan 2015 12:12 |
| PPN: | |
| Sponsoren: | Funded by Helmholtz Research Program Science and Technology of Nanosystems (STN), Funded by Deutsche Forschungsgemeinschaft's Emmy Noether Program. Grant Number: FL 834/1-1 |
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