We study Physics of complex fluids using Microfluidic methods and also address interdisciplinary problems along with Biology & Chemistry groups.
We study the interaction of complex fluids with various surfaces of modified wettability, roughness and porosity. We study dynamics of drops while spreading, impact, and evaporation. We study systems involving such dynamics, inspired from nature, to explore the underlying physical concepts.
Our investigations also involve colloidal self-assembly. In general, we study physics behind patterns formed by active and non-active matter both while drying and wetting.
We also investigate active matter especially active droplets.
Biology with Microfluidics
How pathogens survive in aerosols:
We use microfluidic technology to address biological research problems. We can generate microdroplets in microchannels, which act as reservoirs for micro-organisms and cells. It allows addressing individual cells and studying their metabolic activities. Tiny droplets can mimic bioaerosols that carry pathogens. together with Microbiology scientists, we investigate how pathogens can survive stressful conditions in the aerosols.
Bacterial deposition inside drops
Microfluidic drops can study individual cells
Microfluidic droplet generation. Each droplet is 100 micrometer in diameter
The nucleated microdroplets coalesce and advance in a stepwise manner
Phase separation of a PEG/DEX microdroplet during evaporation. The nucleations flow inside the droplets and eventually merge to form discrete phases.
Arabidopsis thaliana grown on a microfluidic chip. Timelapse image of the root growth.
Microfluidic emulsion droplets evaporate in a gradient manner (Physics of Fluids 34 (2022)).