JMarshall writes: Researchers have built a molecular nanocage 8 nm across that represents a step toward quantum computing. It is difficult to make uniform nanoparticles more than 4 nm across, but new work solves this problem. Researchers made eight-membered metal rings from chromium and nickel that can act like a qubits in quantum computing. More connected rings means greater quantum computing capacity, so the team worked to combine many rings into one molecule. They managed to pull 24 rings together into an 8-nm sphere, secured by palladium ions at the core. The molecule had a surprisingly good phase memory, an indication of the molecule's quantum computing potential. The researchers say building a molecule with 70-100 rings would allow them to do "some serious stuff" in quantum computing.