X-rays reveal platinum crystals forming inside liquid gallium

Scientists at the University of Sydney have achieved a significant breakthrough by using X-ray computed tomography to observe the real-time growth of platinum crystals inside liquid gallium, a process previously considered nearly impossible due to the metal's opacity and density. By dissolving platinum beads in molten gallium or gallium-indium alloys at 500°C and then cooling the mixture, the team captured 3D images revealing intricate frost-like rods and branching crystal formations developing over time. This novel imaging approach, adapted from medical technology, allows researchers to visualize and understand the internal metallic and chemical properties of liquid metals, which are otherwise opaque to traditional microscopy. This advancement holds promising implications for material science and energy technology. The ability to control and tune crystal growth within liquid metals like gallium—a metal that transitions from solid at room temperature to liquid slightly above body temperature—could enable the design of new materials for efficient hydrogen production and quantum technologies. The study highlights liquid metals’ unique combination of fluidity, metallic conductivity, and solvent capabilities