Curvature inducing macroion condensation driven shape changes of fluid vesicles

Area of Science:

• Soft Matter Physics
• Computational Biophysics
• Electrostatics

Background:

• Charged deformable fluid interfaces, like vesicles, exhibit complex behaviors influenced by electrostatic interactions.
• Understanding how surface charge and curvature interplay is crucial for soft matter systems.

Purpose of the Study:

• To investigate the impact of macroion condensation on the shapes of charged deformable fluid interfaces.
• To elucidate the mechanisms by which electrostatic forces and curvature energy dictate vesicle configurations.

Main Methods:

• Dynamically triangulated Monte Carlo simulations were employed.
• The study analyzed both weak and strong electrostatic coupling regimes.

Main Results:

• In weak coupling, vesicle conformations depend on surface charge-charge interactions.
• In strong coupling, condensation-driven curvature induction becomes dominant.
• Condensation is dependent on induced curvature, with higher curvature promoting greater condensation.

Conclusions:

• The interplay of electrostatics and curvature energy drives both curvature generation and sensing.
• These coupled phenomena are key determinants of vesicle configurations in charged deformable fluid interfaces.