This research develops a new method for high-resolution 3D printing of metals such as copper. Instead of laser melting, ultraviolet light forms hydrogel structures that are chemically transformed into metal. The technique enables finer features, reduced waste, and fabrication of advanced materials for applications including batteries, structural engineering, and manufacturing.

This research investigates the century-old Invar effect in iron–palladium alloys under extreme pressure. Using synchrotron experiments and thermodynamic analysis, the study shows that magnetic entropy and vibrational entropy precisely counterbalance each other, eliminating thermal expansion. The findings reveal strong spin-phonon coupling as a key mechanism underlying pressure-induced Invar behavior.