Life-like behavior emerging in active and flexible microstructures

Area of Science:

• Robotics
• Materials Science
• Biomimetics

Background:

• Organisms use shape and activity for motion and adaptation.
• Synthetic microrobots lack flexible bodies for autonomous environmental sensing and reaction.
• Current active micrometer-scale systems are limited in their ability to sense and respond.

Purpose of the Study:

• To experimentally realize active and flexible micrometer-sized structures.
• To integrate mechanical feedback between activity and shape in synthetic systems.
• To develop microrobots with emergent sense-response abilities.

Main Methods:

• Concatenating anisotropic micrometer-sized units using 3D microprinting.
• Activating the structures using alternating current (AC) fields.
• Characterizing the resulting modes of motion and autonomous behaviors.

Main Results:

• Demonstrated a rich array of motion modes: railway and undulatory locomotion, rotation, and beating.
• Observed emergent sense-response abilities, including autonomous reorientation, navigation, and collision avoidance.
• Validated the integration of mechanical feedback between activity and shape.

Conclusions:

• The minimal design of active, flexible microrobots integrates embodied intelligence.
• This approach offers a versatile platform for biomimetic model systems.
• Enables the development of autonomously operating microrobots without traditional sensors, software, or actuators.