Near-static dielectric polarization of individual carbon nanotubes.
basic_science · Level V
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- Record sourced from PubMed, PMID 17705550.
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Abstract
Low-frequency dielectric responses of carbon nanotubes are important for their manipulation, separation, and electronic applications. Here we report the first experimental measurement of near-dc polarization of individual carbon nanotubes by using modified scanning force microscopy techniques. The transverse polarizability of carbon nanotubes is equivalent to solid cylindrical media with a dielectric constant of about 10, irrespective of tube diameter and chirality. The longitudinal polarization is also observed and used to distinguish metallic from semiconducting nanotubes.
Medical subject headings
- Crystallization
- Models, Chemical
- Models, Molecular
- Nanostructures
- Nanotechnology