Vesicles as osmotically stressed capsules

TL;DR

This paper explores the thermodynamic behavior of vesicles under osmotic stress, highlighting differences from hydrostatic pressure effects and providing insights into parameters like membrane permeability.

Contribution

It presents a comparative analysis of osmotic versus hydrostatic stress on vesicles, advancing understanding of osmotic swelling mechanisms.

Findings

Osmotic stress causes distinct thermodynamic responses in vesicles.

Membrane permeability coefficients influence osmotic swelling behavior.

Differences between osmotic and hydrostatic effects are characterized.

Abstract

Vesicular capsules are used to carry biochemicals in biology and liposome technology. Being water-permeable with differing interior and exterior compositions, they are necessarily under osmotic stress. Recent studies have underlined the different thermodynamic behavior of osmotically stressed vesicles in comparison to vesicles subjected to a hydrostatic pressure as studied earlier. Through their different behavior one gains access to the parameters affecting the osmotic swelling of vesicles, such as the membrane-permeability coefficients of solute molecules.