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Incompatible Geometry Regulation of Nanowire Assemblies Enabled Light-Driven Shape Morphing and Motions
Hong Chen1, Haili Qin1, Xin Yao1
1Anhui Province Engineering Research Center of Flexible and Intelligent Materials, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, 230009, P. R. China.
Advanced Materials (Deerfield Beach, Fla.)
|February 5, 2025
Summary
Researchers developed light-activated liquid crystalline elastomers with silver nanowires. These materials exhibit complex shape changes and multimodal locomotion for advanced robotics and smart systems.
Area of Science:
- Materials Science
- Soft Robotics
- Polymer Chemistry
Background:
- Photoresponsive shape-changing materials are crucial for wireless, remote-controlled smart robotics and biomedicine.
- Current light-fueled soft materials have limitations in continuous shape manipulation and mobility.
Purpose of the Study:
- To engineer a hierarchical structure design for integrating rapid, reversible photoactive molecular alignment with mechanically incompatible geometry.
- To develop novel light-driven shape-morphing materials with enhanced mobility and complex motion capabilities.
Main Methods:
- Fabrication of silver nanowire-incorporated nematic liquid crystalline elastomers using a nanowire assemblies-induced geometry engineering method.
- Characterization of multi-length scale anisotropic structures and incompatible elasticity.
- Analysis of morphological transitions and light-driven motions.
Main Results:
- The engineered composite films demonstrated sharp morphological transitions into rings, helicoids, and spirals with diverse helical configurations.
- Complex light-driven motions including rotating, rolling, and jumping were achieved with controlled directionality and magnitude.
- A spiral robot prototype successfully climbed complex terrains, demonstrating task-specific configuration capabilities.
Conclusions:
- The study establishes a regulatory relationship between molecular orientation, shape geometry, and light-driven motions in engineered elastomers.
- This approach enables precise fabrication of novel shape-morphing materials for intelligent robotic systems.
- The developed materials offer advanced control over multimodal locomotion for diverse applications.
