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Related Experiment Video

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Multimodal Bubble Microrobot Near an Air-Water Interface.

Leilei Wang1,2, Li Chen3, Xu Zheng2

  • 1School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China.

Small (Weinheim an Der Bergstrasse, Germany)
|August 31, 2022
PubMed
Summary

Researchers developed a remote-controlled bubble microrobot for air-liquid interfaces. This innovative microrobot offers multiple working modes and enhanced maneuverability using magnetic fields and microbubble dynamics.

Keywords:
air-liquid interfacesbubble microrobotsmagnetic actuationmultiple working modesremote speed control

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Area of Science:

  • Micro-robotics
  • Soft Matter Physics
  • Fluid Dynamics

Background:

  • Developing microrobots for air-liquid interfaces is challenging due to interfacial restrictions.
  • New manipulation strategies are required for robust and multifunctional microrobots.

Purpose of the Study:

  • To develop a remotely controlled bubble microrobot with multiple working modes and high maneuverability at the air-liquid interface.
  • To overcome interfacial restrictions using flexible and reliable mechanisms.

Main Methods:

  • A hollow Janus microsphere (JM) regulated by a magnetic field was used to create the bubble microrobot.
  • The microrobot's functions (pusher, gripper, anchor, sweeper) are enabled by microbubble collapse and directional jet flow.
  • A gamepad was used for remote control of orientation and navigation, with speed modulation achieved via a vertical magnetic field.

Main Results:

  • The bubble microrobot demonstrated switchable working modes and high maneuverability.
  • The microbubble collapse and jet flow acted as a "bubble tentacle" for various functions.
  • Speed modulation was achieved by controlling the JM orientation and jet flow direction using a vertical magnetic field.

Conclusions:

  • This study presents a significant advancement in bubble microrobots for air-liquid interfaces.
  • The findings reveal non-intuitive mechanisms for developing more complex microswimmers.
  • The developed bubble microrobot offers a flexible and robust platform for micro-manipulation tasks.