Krupke, Ralph ; Hennrich, Frank ; Kappes, Manfred M. ; Löhneysen, Hilbert von (2004)
Surface Conductance Induced Dielectrophoresis of Semiconducting Single-Walled Carbon Nanotubes.
In: Nano Letters, 4 (8)
doi: 10.1021/nl0493794
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Dielectrophoresis on surfactant-stabilized single-walled carbon nanotube (SWNT) suspensions has been demonstrated to separate metallic from semiconducting tubes by their different electric field-induced polarizabilities. Here we report that the interaction between SWNTs and the surfactant induces a nanotube surface conductance which gives rise to a unique electric field frequency dependence of the nanotube dielectrophoresis. We observe a surfactant concentration dependent crossover frequency enabling separation of metallic from semiconducting SWNTs at high frequency and deposition of metallic and semiconducting SWNTs at low frequency − both being important aspects for building nanotube-based electronics. Moreover, the data demonstrate that the theoretical description of dielectrophoretic forces is valid beyond the dimensions of cells or viruses.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2004 |
| Autor(en): | Krupke, Ralph ; Hennrich, Frank ; Kappes, Manfred M. ; Löhneysen, Hilbert von |
| Art des Eintrags: | Bibliographie |
| Titel: | Surface Conductance Induced Dielectrophoresis of Semiconducting Single-Walled Carbon Nanotubes |
| Sprache: | Englisch |
| Publikationsjahr: | 13 Juli 2004 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Nano Letters |
| Jahrgang/Volume einer Zeitschrift: | 4 |
| (Heft-)Nummer: | 8 |
| DOI: | 10.1021/nl0493794 |
| Kurzbeschreibung (Abstract): | Dielectrophoresis on surfactant-stabilized single-walled carbon nanotube (SWNT) suspensions has been demonstrated to separate metallic from semiconducting tubes by their different electric field-induced polarizabilities. Here we report that the interaction between SWNTs and the surfactant induces a nanotube surface conductance which gives rise to a unique electric field frequency dependence of the nanotube dielectrophoresis. We observe a surfactant concentration dependent crossover frequency enabling separation of metallic from semiconducting SWNTs at high frequency and deposition of metallic and semiconducting SWNTs at low frequency − both being important aspects for building nanotube-based electronics. Moreover, the data demonstrate that the theoretical description of dielectrophoretic forces is valid beyond the dimensions of cells or viruses. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Molekulare Nanostrukturen |
| Hinterlegungsdatum: | 08 Nov 2011 13:33 |
| Letzte Änderung: | 05 Aug 2021 15:45 |
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