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Related Experiment Video

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4D Printed Soft Microactuator for Particle Manipulation via Surrounding Medium Variation.

Jianchen Zheng1,2,3, Haibo Yu1,2, Yuzhao Zhang1,2,3

  • 1State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang, 110016, China.

Small (Weinheim an Der Bergstrasse, Germany)
|April 9, 2024
PubMed
Summary

Researchers developed a versatile soft actuator using hydrogels that responds to environmental changes for precise particle manipulation. This adaptable microactuator shows promise for multifunctional robotic applications.

Keywords:
4D printing, particle manipulationresponsive hydrogelstwo‐photon polymerization

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Area of Science:

  • Materials Science
  • Robotics
  • Biomedical Engineering

Background:

  • Soft actuators are crucial for innovation across various fields.
  • Current challenges include achieving high environmental adaptability and multi-task capabilities in soft actuators.
  • 3D molding and structural design enable multifunctional soft actuators.

Purpose of the Study:

  • To develop a soft actuator with high environmental adaptability and multi-task capabilities.
  • To modulate the response threshold of soft actuators by tuning hydrogel composition.
  • To demonstrate precise particle manipulation and cell capture using the developed actuator.

Main Methods:

  • Tuning the ratio of stimulus-responsive groups in hydrogels to modulate response thresholds.
  • Employing a heterogeneous bilayer membrane structure and in situ multimaterial printing.
  • Utilizing changes in the surrounding medium (biotic and abiotic) for actuator response.

Main Results:

  • The soft actuator demonstrated rapid deformation in response to surrounding medium changes.
  • Precise 3D capture, manipulation, and release of micron-sized particles were achieved.
  • Static capture of a single red blood cell was successfully realized via biologically responsive medium changes.
  • Finite element analysis accurately predicted experimental outcomes.

Conclusions:

  • The developed soft actuator exhibits high environmental adaptability and multi-task functionality.
  • The approach of tuning hydrogel properties and using bilayer structures is effective.
  • The soft microactuator shows significant potential for use in multifunctional, easily-manipulated robots.