Microfluidic Cell Transport with Piezoelectric Micro Diaphragm Pumps

Area of Science:

• Biotechnology
• Microfluidics
• Cell Biology

Background:

• Automated cell transport is crucial for cell culture research.
• Existing automated transport systems use large pumps with high power consumption and long fluidic connections.
• Space- and energy-efficient piezoelectric micro diaphragm pumps offer an alternative but require minimal mechanical stress on cells.

Purpose of the Study:

• To evaluate the impact of microfluidic cell transport using a novel piezoelectric micro diaphragm pump.
• To investigate different actuation signals for optimal fluidic performance and cell viability.
• To determine the suitability of piezoelectric pumps for integrable microfluidic workflows.

Main Methods:

• Development of a piezoelectric micro diaphragm pump for cell transport.
• Testing of different actuation signals: sinusoidal, rectangular, and a hybrid waveform (rectangular with sinusoidal flanks).
• Assessment of fluidic performance and cell viability under various actuation conditions.

Main Results:

• The hybrid actuation signal demonstrated fluidic performance comparable to the optimal rectangular actuation.
• Hybrid actuation resulted in less cell damage compared to rectangular actuation.
• Cell viability with hybrid actuation showed a 5% reduction, similar to sinusoidal actuation, indicating minimal strain.

Conclusions:

• Piezoelectric micro diaphragm pumps are a viable option for automated cell transport.
• The hybrid actuation signal offers an effective balance between fluidic efficiency and cell viability.
• These pumps are suitable for integration into microfluidic systems, advancing cell culture research.