Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1787368 | Current Applied Physics | 2011 | 5 Pages |
We report quasi-ballistic conduction in single-walled carbon nanotube (SWNT) fibers at room temperature, with a measured mean free path of 1.0–2.6 μm. The dynamic submersion of vertical SWNT fibers into liquid mercury (Hg) electrode shows plateaus and steps indicative of quasi-ballistic electron transport. This response is described with a newly developed network model that uses surface impurities to simplify the parallel conducting channels. The quasi-ballistic SWNT fibers exhibit a resistance per unit length of 2.5–6.5 kΩ/μm and a mean free path exceeding 1 μm, a length longer than typical via dimensions in existing Si-chip technologies. These results highlight that SWNT fiber conductivity can be enhanced by increasing the metallic to semiconducting SWNT ratio and reducing the surface impurities.
► We deposit SWNTs fibers on a tungsten-tip using dielectrophoresis (DEP) method. ► Quasi-ballistic conduction in the SWNT fibers at room temperature is reported. ► The resulting electrical data are described with a newly developed network model.