Spatiotemporally programmed dielectric liquid crystal elastomer: Electro-reversible 3D morphing via inverse 4D printing.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 41296865.
- Also identified by DOI 10.1126/sciadv.aeb2289 and PMC identifier 12652243.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Programmable shape-morphing materials offer transformative potential in soft robotics and biomedical engineering, yet achieving reversible and precise control over complex 3D deformations remains a notable challenge due to the difficulty in spatially programming nonlinear mechanics. Here, we introduce a shear-assisted digital light-processing 4D printing strategy for spatiotemporal programming the mechanical anisotropy of dielectric liquid crystal elastomers (DLCEs). The printed DLCE actuators exhibit reversible multidimensional shape morphing (e.g., bending, twisting, and complex curved surfaces) under electric fields, governed by regional stiffness gradients. An inverse design algorithm is also developed to convert target 3D surfaces into executable printing tasks. Submillimeter-scale fidelity in reconstructing complex geometries, such as a panda face, a biomimetic plant and the Yellow River's landform, demonstrates capabilities applicable to soft robotics and adaptive systems.