Electrical Nanoprobing of Semiconducting Carbon Nanotubes using an Atomic Force Microscope

Abstract

We use an Atomic Force Microscope (AFM) tip to locally probe the electronic properties of semiconducting carbon nanotube transistors. A gold-coated AFM tip serves as a voltage or current probe in three-probe measurement setup. Using the tip as a movable current probe, we investigate the scaling of the device properties with channel length. Using the tip as a voltage probe, we study the properties of the contacts. We find that Au makes an excellent contact in the p-region, with no Schottky barrier. In the n-region large contact resistances were found which dominate the transport properties.

arXiv comment4 pages, 5 figures

References in corpus (4)

• Carbon Nanotubes as Schottky Barrier Transistors
• Transport through the Interface between a Semiconducting Carbon Nanotube and a Metal Electrode
• Coupling of carbon nanotubes to metallic contacts
• Switching behavior of semiconducting carbon nanotubes under an external electric field

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