Researchers have chemically doped carbon nanotube bundles to push their electrical conductivity closer to copper, according to a new paper in Science. The treatment works, but the enhanced conductivity is not stable, meaning the material degrades over time.
Carbon nanotubes have carried decades of broken promises. Synthesis reliably produces tangled, short tubes rather than long uniform ones, and separating metallic from semiconducting forms at scale remains unsolved. Even the metallic variant, which carries current with minimal resistance, has a hard ceiling on electron throughput.
The instability finding is the detail worth reading for. It tells you exactly where the materials science bottleneck sits, what chemical pathway got closest to copper-grade performance, and why the next research target is a dopant that does not decay. The full paper maps the gap between lab result and usable wire.
[READ ORIGINAL →]