IBM has developed 9nm carbon nanotubes that can be used to make transistors

Carbon nanotubes are a very good physical property. They have both strong mechanical properties and are quite good at carrying electrons. IBM researchers have created carbon nanotubes with a size of only 9 nanometers, which can produce very small transistors. The smallest transistor currently used in civilian products is Intel's Ivy Bridge. IBM's prototype perfectly replaces this Silicon Transistor, which has more powerful computing power and much lower power consumption.

However, this nano-transistor prototype technology will not be put into production for the time being, because researchers have not yet determined how to use carbon nanotubes to manufacture a processor product, and there are still some difficulties in process and technology that have not been overcome.