Yeast-Driven and Bioimpedance-Sensitive Biohybrid Soft Robots

Area of Science:

• Robotics
• Biotechnology
• Biomaterials

Background:

• Biohybrid robots merge biological components with synthetic materials for advanced robotic functions.
• Yeast fermentation offers a unique biological process for generating pressure and enabling robotic actuation and sensing.

Purpose of the Study:

• To explore the use of yeast fermentation dynamics for actuation and sensing in soft robotic systems.
• To integrate bioimpedance sensing for real-time monitoring of yeast metabolic activity and growth.

Main Methods:

• Developed a yeast-driven soft limb, inflatable membrane actuator, palpation probe, and gripper.
• Integrated an adjustable single-resistor oscillator circuit with a digital potentiometer for bioimpedance measurements.
• Modeled yeast growth rate based on measured impedance frequency.

Main Results:

• Demonstrated yeast fermentation's capability to generate pressure for robotic actuation.
• Showcased real-time monitoring of yeast behavior and metabolic dynamics using bioimpedance sensing.
• Validated the sensitivity of the oscillator circuit to yeast concentration and its correlation with actuation power.

Conclusions:

• Yeast fermentation and bioimpedance sensing can be integrated to create adaptable and functional biohybrid robots.
• Yeast-driven robotic components exhibit potential for applications in tactile sensing, tissue palpation, and object manipulation.
• This research provides a foundation for developing advanced biohybrid robotic systems with lifelike behaviors.