Shapeshifting plastics could revolutionize microrobotics and minimally invasive surgery
Shape memory polymers are "smart" plastic materials that can be transformed into a temporary shape and then return to their original shape, triggered by an external stimulus such as heat or pressure. These polymers can be programmed to create highly complex shapes – coils, knots, even origami-like shapes – but the transformations have conventionally been irreversible.
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