Fig. 4: NIR-responsive 4D printing of LMPCs with 1 wt% RLMNPs.
From: 3D-printed liquid metal polymer composites as NIR-responsive 4D printing soft robot
a The diagram of photothermally induced 4D printing; (b) Photothermal effect and (c) the recovery angle (%) on the time of 3D-printed composites; The line graph in red denotes 3D-printed LMPCs under the laser irradiation (λmax = 808 nm, 0.3 W/cm2); The line graph in green denotes 3D-printed objects without RLMNPs under the same laser irradiation; The line graph in blue denotes 3D-printed LMPCs in darkness; (d) The shape recovery process of 3D-printed LMPCs under laser irradiation (λmax = 808 nm, 0.3 W/cm2) for 60 s; (e) The controllable shape recovery of 3D-printed materials by switching ON/OFF the laser; (f) The shape recovery process of spiral objects under laser irradiation (λmax = 808 nm, 0.3 W/cm2); (g) Mechanical properties of LMPCs before and after performing NIR-responsive 4D printing. Bars in (g) represent means ± SE (n = 3 independent 3D-printed samples). Statistical significance is calculated based on an unpaired two-sided t-test and ns means not significant.
