Fig. 4: Autonomous shape recovery of 4D printed structures. | Nature Communications

Fig. 4: Autonomous shape recovery of 4D printed structures.

From: 4D printing of trigger-free shape-memory hydrogels towards self-adaptive substrates for bioelectronics

Fig. 4: Autonomous shape recovery of 4D printed structures.

a Single-step shape recovery of a Miura origami structure with a tonset of 2 min. The sample was programed at 90 °C for 1 min. b Dual-step recovery with two separate tonset. The chess board patterns relate to double-side exposure of 120 s. c A spiral connector with multiple tonset for bridging. All the scale bars are 5 mm.

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