Futurity -- U. CHICAGO (US) — A low-power laser—similar to the common laser pointer—can cause gold and carbon nanoparticles to assemble into long chains that follow the laser beam as it moves. “You can think of it like going to the beach and pointing a stick at the sand,” says Liaohai Chen, an Argonne National Laboratory researcher who helped develop the technology, “and then all of a sudden having pebbles gather and join together wherever you decided to point the stick.”
