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Multiresponsive Microactuator for Ultrafast Submillimeter Robots.

Xusheng Hui1, Jianjun Luo1, Rong Wang1

  • 1School of Astronautics, Northwestern Polytechnical University, Shaanxi 710072, China.

ACS Nano
|March 28, 2023
PubMed
Summary
This summary is machine-generated.

Untethered microrobots achieve ultrafast inchworm-type movement using electrical/optical actuation. This breakthrough enables precise, rapid locomotion for environmental monitoring and biomedical applications.

Keywords:
microactuatormicroelectromechanical systems (MEMS)microrobotmultiresponsivenanofilms

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Area of Science:

  • Micro-robotics
  • Materials Science
  • Nanotechnology

Background:

  • Untethered submillimeter microrobots offer potential in environmental monitoring, reconnaissance, and biomedicine.
  • Current microrobots are limited by slow movement speeds.

Purpose of the Study:

  • To develop untethered ultrafast submillimeter microrobots.
  • To enable precise and rapid locomotion for microrobots.

Main Methods:

  • Fabrication of microrobots using multilayer nanofilms with designed patterns and high surface-to-volume ratios.
  • Actuation via electrical/optical methods (voltages and lasers).
  • Analysis of motion speed, adaptability, and directional control.

Main Results:

  • Achieved ultrafast inchworm-type movement with speeds up to 2.96 mm/s (3.66 body lengths/s).
  • Demonstrated precise directional control with angular speeds up to 167.3°/s.
  • Verified robustness, withstanding loads 67,000 times their weight and reversed states.

Conclusions:

  • The developed microrobots offer a strategy for 3D microactuators with precise and rapid responses.
  • These microrobots are suitable for delicate tasks in narrow and restrictive environments.
  • The microfabrication approach allows for simultaneous production of various 3D microrobot designs.