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Updated: Jun 22, 2026
08:35
Lipid Bilayer Vesicle Generation Using Microfluidic Jetting
Published on: February 21, 2014
Dynamics of a vesicle in general flow
J Deschamps1, V Kantsler, E Segre
1Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 76100, Israel.
Summary
Researchers quantitatively studied vesicle dynamics in fluid flow using a novel dynamical trap. They mapped vesicle motion states (tank-treading, tumbling, trembling) across various flow types, revealing key control parameters for their behavior.
Area of Science:
- Fluid dynamics
- Biophysics
- Microfluidics
Background:
- Vesicle dynamics in fluid flow are crucial for biological processes.
- Understanding these dynamics requires controlled experimental conditions.
- Previous studies were limited in mapping the full range of vesicle behaviors.
Purpose of the Study:
- To develop a quantitative approach for studying vesicle dynamics in fluid flow.
- To investigate vesicle behavior across rotational, shearing, and elongational flow regimes.
- To map the phase diagram of vesicle motions.
Main Methods:
- Utilized a microfluidic 4-roll mill as a dynamical trap.
- Controlled the ratio of vorticity to strain rate to vary flow conditions.
- Experimentally studied vesicle dynamics, including tank-treading (TT), tumbling (TU), and trembling (TR).
Main Results:
- Vesicle dynamical states are governed by two dimensionless control parameters.
- Achieved transitions between TT, TU, and TR at viscosity ratio (lambda) = 1, unlike pure shear flow.
- Uncovered the physics governing the trembling (TR) state.
Conclusions:
- The study provides a comprehensive phase diagram for vesicle dynamics.
- Findings align with theoretical predictions for quasi-spherical vesicles.
- The developed method allows for the study of vesicles with significant shape deviations.
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