A remotely-controlled locomotive IC driven by electrolytic bubbles and wireless powering.

Area of Science:

• Microelectromechanical systems (MEMS)
• Integrated circuit (IC) design
• Robotics and locomotion

Background:

• Traditional micro-locomotion often requires external components like magnets or coils.
• Wireless power and control for micro-devices present significant engineering challenges.
• Electrolysis-based propulsion offers a potential alternative for miniaturized systems.

Purpose of the Study:

• To develop a batteryless, remotely-controlled locomotive integrated circuit (IC).
• To utilize electrolytic bubbles generated on-chip as the sole source of propulsion.
• To demonstrate wireless control and movement capabilities in a miniaturized system.

Main Methods:

• Fabrication of a locomotive IC using 0.35 μm CMOS technology.
• Integration of a receiving coil and electrolysis electrodes directly onto the chip.
• Wireless power and control via a 10 MHz ASK modulated signal with RS232 commands.
• Experimental validation of movement in an electrolyte medium.

Main Results:

• Successful realization of a batteryless, remotely-controlled locomotive IC.
• Demonstrated wireless power and control without external components.
• Achieved locomotion speeds up to 0.3 mm/s with directional control.
• Measured power consumption of 207.4 μW and 180 μW with electrolysis voltages of 2 V and 1.3 V.

Conclusions:

• The study successfully demonstrates a novel micro-locomotion system powered by on-chip generated electrolytic bubbles.
• This batteryless IC represents a significant advancement in untethered micro-robotics and remote sensing.
• The integrated design offers a pathway towards self-contained, wirelessly controlled micro-devices for various applications.