A very special (and tiny) Christmas tree

The structure and all details are made of polymer hardened by the scanning of a focused laser beam.

Atomic-scale nanowires can now be produced at scale

Researchers have discovered a way to make self-assembled nanowires of transition metal chalcogenides at scale using chemical vapor deposition. By changing the substrate where the wires form, they can tune how these wires are arranged, from aligned configurations of atomically thin sheets to random networks of bundles.