Lab-on-a-chip with beta-poly(vinylidene fluoride) based acoustic microagitation

Area of Science:

• Microfluidics
• Biochemical Sensors
• Polymer Science

Background:

• Lab-on-a-chip devices offer miniaturized platforms for biochemical analysis.
• Efficient mixing and controlled heating are crucial for optimizing reaction kinetics in microfluidic systems.
• Piezoelectric polymers present opportunities for integrated actuation in disposable devices.

Purpose of the Study:

• To report a fully integrated disposable lab-on-a-chip device incorporating acoustic microagitation.
• To evaluate the efficiency of the microagitation system and the contribution of generated heating.
• To demonstrate the device's capability for biochemical parameter measurement in physiological fluids, specifically uric acid in urine.

Main Methods:

• Fabrication of a two-die system: a fluidic die with SU-8 reaction chambers and ss-PVDF polymer, and a CMOS-based detection die.
• Integration of piezoelectric ss-poly(vinylidene fluoride) (ss-PVDF) polymer for acoustic microagitation.
• Optical absorption spectroscopy for biochemical parameter measurement.
• Evaluation of microagitation efficiency based on signal actuation amplitude and frequency.

Main Results:

• The acoustic microagitation effectively improves mixing and reduces reaction times.
• The microagitation system generates heat, further contributing to accelerated reaction kinetics.
• The system demonstrated successful measurement of uric acid concentration in urine samples.

Conclusions:

• The developed lab-on-a-chip device with acoustic microagitation offers an efficient platform for rapid biochemical analysis.
• The piezoelectric ss-PVDF polymer is a viable material for integrated microfluidic actuation.
• This technology holds potential for point-of-care diagnostics and personalized medicine.