Simultaneous Deposition of Metallic Bundles of Single-walled Carbon Nanotubes Using Ac-dielectrophoresis

• Published in: Nano letters Vol. 3; no. 8; pp. 1019 - 1023
• Main Authors: Krupke, R, Hennrich, F, Weber, H. B, Kappes, M. M, v. Löhneysen, H
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 01.08.2003
• Subjects: Applied sciences; Cross-disciplinary physics: materials science; rheology; Electronics; Exact sciences and technology; Materials science; Molecular electronics, nanoelectronics; Nanoscale materials and structures: fabrication and characterization; Nanotubes; Physics; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Sonication; Singlewalled nanotubes; MESFET; Process control; Metals; Nanotubes; Particle suspension; Experimental study; Carbon; Wiring; Nanotube bundle; Selective growth; Nonmetals; Dielectrophoresis; Pulses; Nanostructured materials; Nanotechnology; Alternating current
• ISSN: 1530-6984; 1530-6992
• DOI: 10.1021/nl0342343

A simple and scalable scheme based on alternating current (ac-) dielectrophoresis is used for the simultaneous and site-selective deposition of single bundles of single-walled carbon nanotubes (SWNTs) onto a large number of contacts requiring only one bond wire. This allows for a large number of transport measurements that show that the deposited bundles contain at least one metallic SWNT dominating the transport. With high-voltage pulses, metallic bundles are transformed into Schottky-barrier-type field-effect transistors with p-type, ambipolar, or n-type behavior. From a simple electromechanical model, we derive the fact that ac-dielectrophoresis selectively deposits bundles containing metallic tubes.