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), pp. 2475-2479. WILEY-VCH Verlag GmbH & Co. KGaA, ISSN 03701972,
[Article]
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.
| Item Type: | Article |
|---|---|
| Erschienen: | 2014 |
| Creators: | Li, Wenshan ; Pyatkov, Feliks ; Dehm, Simone ; Flavel, Benjamin S. ; Krupke, Ralph |
| Title: | Deposition of semiconducting single-walled carbon nanotubes using light-assisted dielectrophoresis |
| Language: | English |
| 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. |
| Journal or Publication Title: | physica status solidi (b) |
| Volume of the journal: | 251 |
| Issue Number: | 12 |
| Publisher: | WILEY-VCH Verlag GmbH & Co. KGaA |
| Uncontrolled Keywords: | dielectrophoresis, exciton dissociation, nanotube, polarizability |
| Divisions: | 11 Department of Materials and Earth Sciences > Material Science > Fachgebiet Molekulare Nanostrukturen 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences |
| Date Deposited: | 08 Jan 2015 12:12 |
| URL / URN: | http://dx.doi.org/10.1002/pssb.201451280 |
| Identification Number: | doi:10.1002/pssb.201451280 |
| PPN: | |
| Funders: | 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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