Related Experiment Video
Updated: May 30, 2026
08:45
Glass-Based Devices to Generate Drops and Emulsions
Published on: April 5, 2022
Self-assembling of multi-jets by pyro-electrohydrodynamic effect for high throughput liquid nanodrops transfer
Sara Coppola1, Veronica Vespini, Simonetta Grilli
1CNR Istituto Nazionale di Ottica, Section of Napoli, Via Campi Flegrei, 34 Pozzuoli, Napoli, Italy.
Lab on a Chip
|August 16, 2011
Summary
Researchers developed a novel pyro-electro-hydro-dynamics (EHD) inkjet method to create multiple, self-assembled liquid jets. This nozzle-free technique efficiently dispenses nanolitre drops, ideal for viscous liquids in high-throughput applications.
Area of Science:
- Materials Science
- Fluid Dynamics
- Physics
Background:
- Electrohydrodynamics (EHD) is a field studying the motion of fluids under electric fields.
- The pyroelectric effect involves generating an electric charge in response to a temperature change in certain materials.
- Controlling liquid behavior with electric fields is crucial for microfluidic and inkjet technologies.
Purpose of the Study:
- To investigate the destabilization of liquid films using pyroelectric-induced EHD pressure.
- To demonstrate the formation of periodical, self-assembled multi-jets.
- To explore the potential of this novel pyro-EHD inkjet approach for high-throughput liquid transfer, especially for viscous liquids.
Main Methods:
- Utilizing the pyroelectric effect in a polar dielectric crystal to generate EHD pressure.
- Inducing destabilization of a liquid film on the crystal surface.
- Observing and analyzing the formation of self-assembled liquid jets.
- Testing the process with a viscous liquid polymer (PDMS).
Main Results:
- Achieved controlled destabilization of a liquid film via pyroelectric EHD pressure.
- Successfully generated periodical, self-assembled multi-jets operating simultaneously.
- Demonstrated the capability to dispense liquids in nanolitre drops.
- Validated the method's suitability for highly viscous liquids due to the absence of nozzles and electrodes.
Conclusions:
- The pyro-EHD inkjet approach offers a novel, nozzle-free method for generating multiple liquid jets.
- This technique is highly effective for precise, high-throughput liquid dispensing, particularly for viscous fluids.
- The self-assembled multi-jet system presents significant potential for advanced microfluidic applications.
