4D printed structures remember shape

Researcher used 3D printing technology to create structures that “remember” their shape, actively transforming configurations over time in response to environmental stimuli. The video presents a miniature Eiffel Tower that recovers shape after heating to 60 °C and 3D printed multimaterial grippers used to grab an object. Credit: Multimaterial 4D Printing with Tailorable Shape Memory Polymers Qi Ge, Amir Hosein Sakhaei, Howon Lee, Conner K. Dunn, Nicholas X. Fang & Martin L. Dunn Scientific Reports, doi:10.