Once unimaginable, transistors consisting only of several-atom clusters or even single atoms promise to become the building blocks of a new generation of computers with unparalleled memory and processing power. But to realize the full potential of these tiny transistors - miniature electrical on-off switches - researchers must find a way to make many copies of these notoriously difficult-to-fabricate components.
https://phys.org/news/2020-05-scientists-recipe-single-atom-transistors.html