Double-walled nanotube cables could replace traditional wiring

Highly conductive nanotube-based cables could be just as efficient as traditional metals at a sixth of the weight, said Enrique Barrera, a Rice professor of mechanical engineering and materials science.

They may find use first in applications where weight is a critical factor, such as in aircraft and cars, and in the future could even replace traditional wiring in homes.

The cables developed in the study are spun from nanotubes and can be tied together without losing their conductivity. To increase the conductivity of the cables, the team doped them with iodine and the cables are said to have remained stable. The conductivity-to-weight ratio (specific conductivity) is claimed to be better than in metals, including copper and silver, and is second only to sodium, the metal with the highest specific conductivity.

The work appears this week in the Nature journal Scientific Reports.

Yao Zhao is the new paper’s lead author. He built the demo rig that let him toggle power through the nanocable and replace conventional copper wire in the light-bulb circuit.