Improved understanding of glassy dynamics could help scientists explain why a liquid behaves like a solid, and develop useful new materials. Researchers have identified a hidden phase transition in amorphous materials like plastic and glass. Through combining theory, simulations, and previous stu
Above an onset temperature, a 2D material exhibits normal liquid behavior with all particles similarly mobile . Below that temperature, it becomes supercooled, with the onset of rigidity leading to just some mobile particles amongst solid-like ‘frozen’ regions . Credit: Kranthi Mandadapu
Anything made out of plastic or glass is known as an amorphous material. Unlike many materials that freeze into crystalline solids, the atoms and molecules in amorphous materials never stack together to form crystals when cooled. In fact, although we commonly think of plastic and glass as “solids,” they instead remain in a state that is more accurately described as a supercooled liquid that flows extremely slowly.
“The onset temperature for glassy dynamics is like a melting temperature that ‘melts’ a supercooled liquid into a liquid. This should be relevant for all supercooled liquids or glassy systems,” said Mandadapu.
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