Active PZT Composite Microfluidic Channel for Bioparticle Manipulation

Area of Science:

• Biomedical Engineering
• Materials Science
• Nanotechnology

Background:

• Precise manipulation of particles is crucial in biomedical applications.
• Existing microchannel technologies face limitations in dynamic control.
• Development of active microchannels offers advanced capabilities for particle handling.

Purpose of the Study:

• To propose a novel vibration-assisted thermal imprint method for creating active microchannels.
• To investigate the use of lead zirconate titanate (PZT) nanocomposite piezo polymer for microchannel fabrication.
• To demonstrate the particle manipulation capabilities of the developed active microchannel.

Main Methods:

• Synthesized lead zirconate titanate (PZT) nanopowder and mixed it with binding materials (PVB, PMMA, PS) to create screen-printing paste.
• Fabricated PZT composite coatings on copper foil using screen printing and polarized them.
• Analyzed material properties using SEM, COMSOL Multiphysics, and contact angle measurements.
• Simulated and experimentally validated microchannel behavior using holographic interferometry.

Main Results:

• Successfully fabricated PZT nanocomposite coatings with varying hydrophobic properties.
• Demonstrated that excited acoustic waves in the microchannel enable trapping-patterning, valve, and free particle passing modes.
• Observed wave-shaped vibration forms of the microchannel, confirming its particle manipulation functionality.

Conclusions:

• The proposed vibration-assisted thermal imprint method is effective for creating active microchannels in piezo polymer layers.
• The developed PZT-based active microchannel offers precise control over particle manipulation for biomedical applications.
• This technology holds potential for advancing microfluidic devices in diagnostics and therapeutics.