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About

Sijun Liu is a leading researcher in the development of advanced functional hydrogels and soft electronic sensors, with a particular focus on stretchable, self-healing materials for 3D and 4D printing applications. Liu’s most impactful contribution is the creation of an ultrastretchable, self-healing double-network hydrogel, which combines ionically cross-linked κ-carrageenan with covalently cross-linked polyacrylamide. This work, cited over 450 times, leverages thermoreversible sol-gel transitions to achieve remarkable mechanical resilience and autonomous healing, setting a new benchmark for printable smart materials. Building on this foundation, Liu has pioneered hydrogel and ionogel composites for biomimetic skin-like sensors, including a hybrid ionogel sensor with multiple sensory capabilities and a multilayer self-filled iontronic pressure sensor that delivers ultrahigh sensitivity across a broad pressure range. These innovations have significant implications for wearable electronics, soft robotics, and human-machine interfaces. With a growing citation record and a clear trajectory toward practical, high-performance sensing devices, Liu’s work continues to inspire advances in flexible, intelligent materials.