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'4D Printing' with Shape-Shifting Smart Gel

Rutgers University engineers have developed a '4D printing' method for a smart hydrogel that could lead to the development of 'living' structures in human organs, soft robots, and drug delivery. The approach involves printing a 3D object with a hydrogel that changes shape over time, when temperatures change.Rutgers University engineer Howon Lee spoke with Tech Briefs about the manufacturing possibilities.