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Stimulus-driven liquid metal and liquid crystal network actuators for programmable soft robotics.

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Researchers developed a new method to create advanced soft robots. This technique integrates liquid metals and liquid crystal networks for adaptable, programmable soft robotics with electronic functions.

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Area of Science:

  • Soft matter engineering
  • Materials science
  • Robotics

Background:

  • Developing untethered soft robots with integrated electronic functions and biomimetic capabilities is an emerging field.
  • Integrating flexible electronics into soft robotic actuators faces challenges like strain mismatch and material incompatibility.

Purpose of the Study:

  • To present a general strategy for integrating electrically conductive liquid metals (LMs) and shape-morphing liquid crystal networks (LCNs).
  • To develop multifunctional and programmable soft robotics by overcoming integration challenges.

Main Methods:

  • Fabrication of a unique colloidal LM ink using ultrasonicating LMs and miniature carboxylated gold nanorods (MiniGNR-COOH) in bacterial cellulose suspension.
  • Utilizing the nanocellulose-based colloidal LM ink for creating shape-deformable, electrically conductive LM-LCN soft robots.
  • Demonstrating electro- and photo-thermal actuation of the soft robots.

Main Results:

  • Successful integration of LMs and LCNs into multifunctional soft robotic actuators.
  • Development of a nanocellulose-based colloidal LM ink with enhanced adhesion and photothermal efficiency.
  • Proof-of-concept demonstrations including a light-fueled soft oscillator, an inchworm-inspired soft crawler, and programmable robotic Shadow Play.

Conclusions:

  • The disclosed strategy enables the creation of advanced multifunctional soft materials for programmable soft robotics.
  • This approach offers potential applications in bioinspired soft machines, integrated soft electronics, and human-computer interaction.