Transport of Ultra-Large Cargo via Dynamic Janus Structure Reconstruction Enabled by Microrobots

Area of Science:

• Robotics
• Materials Science
• Biotechnology

Background:

• Micro/nanorobots (MNRs) with dielectrophoretic forces offer label-free cargo transport.
• Current MNRs face limitations in transporting cargo significantly larger than themselves.

Purpose of the Study:

• To develop a novel transport strategy for micro/nanorobots to overcome cargo volume limitations.
• To enable the transport of large-volume cargoes using micro/nanorobots.

Main Methods:

• Introduced a "dynamic Janus structure reconstruction" strategy using asymmetric tubular electrically driven microrobots (ATEDMs).
• Utilized high-frequency electric fields to attract ATEDMs to cargo, forming Janus-like structures.
• Integrated static magnetic fields for directed and controlled cargo transport.
• Employed probabilistic statistical methods to determine optimal ATEDM numbers for various motion patterns.

Main Results:

• Demonstrated successful transport of cargo over 100,000 times the volume of a single microrobot.
• Achieved directed and controlled cargo transport by integrating static magnetic fields.
• Showcased applications in cargo palletizing and large biological tissue transportation.

Conclusions:

• The "dynamic Janus structure reconstruction" strategy effectively overcomes cargo volume limitations for micro/nanorobots.
• This approach significantly expands the application potential of micro/nanorobots in complex environments.
• The method provides a versatile solution for large-volume cargo transportation.