Related Experiment Video
Updated: Jun 26, 2026

Phase Behavior of Charged Vesicles Under Symmetric and Asymmetric Solution Conditions Monitored with Fluorescence Microscopy
Published on: October 24, 2017
Phase behavior of semifluorinated catanionic mixtures: head group dependence and spontaneous formation of vesicles
Elena Blanco1, Ulf Olsson, Juan M Ruso
1Biophysics and Interfaces Group, Department of Applied Physics, Faculty of Physics, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain. mariaelena.blanco@usc.es
Abstract:
Hexadecyltrimethylammonium bromide (C(16)TAB)-sodium perfluorooctanoate (C(8)FONa) and hexadecylpyridynium bromide (C(16)PyB)-C(8)FONa catanionic semifluorinated mixtures have been studied by conductivity, dynamic light scattering (DLS), cryo-transmission electron microscopy (cryo-TEM) and polarizing microscopy. The regular solution theory, applicable for a limited fluorinated molar ratio, does not predict long-range electrostatic interactions. The results are consistent with the fact that in the hydrogenated-rich region the interaction is attractive in both catanionic mixtures. The systems containing pyridinium headgroups were of the stronger interaction. A transition from micelles was found in both mixtures as a function of fluorinated molar ratio. Special attention was devoted to the effect of the head group in the system properties. The information related with the mean vesicle radius measured by DLS was compared with the vesicle size distribution as well as the elastic properties of the bilayer measured with cryo-TEM.
More Related Videos
07:01Preparation of Hollow Polystyrene Particles and Microcapsules by Radical Polymerization of Janus Droplets Consisting of Hydrocarbon and Fluorocarbon Oils
Published on: January 25, 2018
06:44From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
Published on: March 24, 2018
Related Concept Videos
Micelles
Cationic Chain-Growth Polymerization: Mechanism
Anionic Chain-Growth Polymerization: Mechanism
SNAREs and Membrane Fusion
SNAREs exist in pairs that symmetrically interact and catalyze the fusion of the lipid bilayers in vesicle and target organelle. v-SNARE in the vesicle membrane are single polypeptide chains that bind to a complementary t-SNARE, composed of 2...
VSEPR Theory and the Basic Shapes
Anionic Chain-Growth Polymerization: Overview