"Ask HN: Can CPUs etc. be made from just graphene and/or other carbon forms?" (2024) https://news.ycombinator.com/item?id=40719725

"Ask HN: How much would it cost to build a RISC CPU out of carbon?" (2024) https://news.ycombinator.com/item?id=41153490

Or CNT Carbon Nanotubes, or TWCNT Twisted Carbon Nanotubes.

From "Rivian reduced electrical wiring by 1.6 miles and 44 pounds" (2024) https://news.ycombinator.com/item?id=41210021 :

> Are there yet CNT or TWCNT Twisted Carbon Nanotube substitutes for copper wiring?

"Twisted carbon nanotubes store more energy than lithium-ion batteries" (2024? https://news.ycombinator.com/item?id=41159421