Researchers from Pusan National University have developed magnetic smart materials that can change shape on demand using ultraviolet light. These materials, called disulfide-based covalent adaptable networks (DS-CANs), can fix and reconfigure shapes without solvents or resins, overcoming limitations of traditional shape-shifting polymers. When exposed to UV light or heat, the materials can permanently fix their shape, and an opposing magnetic field can reset them. The team demonstrated the creation of reprogrammable micropillar arrays and complex microstructures, such as shark-skin-inspired ribbed denticles. The technology has potential applications in tunable robotics and drug delivery. Unlike traditional methods, DS-CANs allow for infinite reversibility and can repair damage or weld components. The study, published in Advanced Materials, was a collaboration with Hanyang University and Dong-Eui University, and is scheduled to be featured on the cover in July 2025. This breakthrough addresses key limitations of earlier methods, including water sensitivity and irreversibility.
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