[Soft-matter] Soft Matter & Complex Systems Seminar on 10 Jan 2025

[Maciej Lisicki]

Dear Soft Matter & Complex Systems Colleagues and Friends,

Happy New Year to all! 

On Friday 10 January 2025 at 9:30 AM at the UW Faculty of Physics (Pasteura 5, Warsaw; room 1.40) we are hosting a seminar during which 

Tetuko Kurniawan (IPPT PAN)

will give a talk
Formation of Droplets in Microfluidic Cross-Junctions and Their Application as Cell Incubators

Abstract

Droplet microfluidics is an innovative technique in biomedical research that leverages the creation of small, isolated compartments formed by immiscible fluids, typically a water-in-oil system, within a network of microscale channels on a chip. In this talk, I will explore droplet formation in the very low capillary number regime. Interestingly, droplet formation in this regime diverges from the well-known squeezing mechanism, as evidenced by a significant increase in droplet size and neck length before pinch-off with respect to the capillary number. A generalized scaling law was developed to predict droplet volume in microfluidic cross-junctions and was validated using experimental data from devices with varying cross-sectional geometries. These findings deepen our understanding of droplet formation mechanics in the very low capillary number range. Additionally, I will discuss the practical applications of droplet microfluidics as micro-sized incubators for cell culture. Effective strategies for reducing the loading time of cell-containing media and minimizing droplet liquid mass transport through the permeable PDMS material will be presented, resulting in the ability to sustain the viability of most cells for over 24 hours.

We warmly welcome everyone to attend the talk and the Soft Matter Coffee Break after the seminar, held in room 2.63 (2nd floor).

Maria Ekiel-Jeżewska
Maciej Lisicki
Piotr Szymczak
Panagiotis Theodorakis
Marek Trippenbach
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