Iodine doped carbon nanotube cables exceeding specific electrical conductivity of metals.

Scientific Reports
Yao ZhaoEnrique V Barrera

Abstract

Creating highly electrically conducting cables from macroscopic aggregates of carbon nanotubes, to replace metallic wires, is still a dream. Here we report the fabrication of iodine-doped, double-walled nanotube cables having electrical resistivity reaching ∼10⁻⁷ Ω.m. Due to the low density, their specific conductivity (conductivity/weight) is higher than copper and aluminum and is only just below that of the highest specific conductivity metal, sodium. The cables exhibit high current-carrying capacity of 10⁴∼10⁵ A/cm² and can be joined together into arbitrary length and diameter, without degradation of their electrical properties. The application of such nanotube cables is demonstrated by partly replacing metal wires in a household light bulb circuit. The conductivity variation as a function of temperature for the cables is five times smaller than that for copper. The high conductivity nanotube cables could find a range of applications, from low dimensional interconnects to transmission lines.

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Citations

Jul 24, 2013·Nature Communications·Chandramouli SubramaniamKenji Hata
Sep 17, 2015·ACS Nano·Santiago EsconjaureguiJohn Robertson
Aug 1, 2015·ACS Applied Materials & Interfaces·Deok Yeon LeeSung-Hwan Han
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Jan 23, 2020·Materials·Patrycja TaborowskaAgnieszka Lekawa-Raus
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Methods Mentioned

BETA
X-ray
x-ray photoelectron spectroscopy

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