Self-Powered Portable Electronic Reader for Point-of-Care Amperometric Measurements

Area of Science:

• Biomedical Engineering
• Sensor Technology
• Energy Harvesting

Background:

• Point-of-care diagnostics require portable and self-sufficient power solutions.
• Fuel cells (FCs) offer a promising energy source but integrating them as sensors is challenging.
• Existing diagnostic devices often rely on external power or complex laboratory equipment.

Purpose of the Study:

• To develop a self-powered electronic reader (e-reader) for point-of-care diagnostics.
• To utilize a fuel cell (FC) as an integrated power source and sensor.
• To create a low-power, robust device operable without external power or laboratory equipment.

Main Methods:

• Designed a custom electronic instrumentation platform for low power consumption.
• Integrated a fuel cell (FC) to simultaneously power the device and sense fuel concentration.
• Validated the e-reader's performance using emulated FCs and literature-based sensors.

Main Results:

• The self-powered e-reader operates using energy from the FC, detecting fuel concentration.
• The device exhibits low power consumption (900 µW) and can operate at a minimum voltage of 330 mV.
• Achieved adjustable current ranges up to 3 mA with 13 nA resolution and 1.8% uncertainty.

Conclusions:

• The developed self-powered e-reader offers a robust, low-power solution for point-of-care diagnostics.
• This integrated FC-based system eliminates the need for external power and laboratory equipment.
• The technology has potential applications in biomedical, environmental monitoring, and other fields.