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Related Concept Videos

Cohesion01:07

Cohesion

55.2K
Cohesion is the attraction between molecules of the same type, such as water molecules. Water molecules have an overall neutral charge but are polar molecule. An oxygen atom in one water molecule has a partial negative charge that can bind to a hydrogen atom with a partial positive charge in a second water molecule, forming a hydrogen bond. Each water molecule can form up to four hydrogen bonds with other water molecules. Hydrogen bonds are responsible for water's cohesive nature.
On a...
55.2K
Aqueous Solutions and Heats of Hydration02:42

Aqueous Solutions and Heats of Hydration

14.9K
Water and other polar molecules are attracted to ions. The electrostatic attraction between an ion and a molecule with a dipole is called an ion-dipole attraction. These attractions play an important role in the dissolution of ionic compounds in water.
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
14.9K
Intermolecular Forces03:13

Intermolecular Forces

60.2K
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen...
60.2K
Solubility03:00

Solubility

18.0K
Solution, Solubility, and Solubility Equilibrium
A solution is a homogeneous mixture composed of a solvent, the major component, and a solute, the minor component. The physical state of a solution—solid, liquid, or gas—is typically the same as that of the solvent. Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration).
In a solution, the solute particles (molecules,...
18.0K
Colloidal precipitates01:09

Colloidal precipitates

731
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
731
Surface Tension, Capillary Action, and Viscosity02:57

Surface Tension, Capillary Action, and Viscosity

28.8K
Surface Tension
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
28.8K

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Updated: Sep 1, 2025

Assembly and Characterization of Polyelectrolyte Complex Micelles
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Assembly and Characterization of Polyelectrolyte Complex Micelles

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Wetting behavior of polyelectrolyte complex coacervates on solid surfaces.

Christopher Balzer1, Pengfei Zhang2, Zhen-Gang Wang1

  • 1Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, USA. balzer@caltech.edu.

Soft Matter
|August 17, 2022
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Summary
This summary is machine-generated.

Complex coacervates

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Area of Science:

  • Surface Science
  • Polymer Science
  • Physical Chemistry

Background:

  • Complex coacervates are crucial in surface science applications like adhesives and coatings.
  • Wetting behavior depends on solution conditions, polymer-substrate interactions, and bulk phase behavior.

Purpose of the Study:

  • Investigate complex coacervate wetting on solid surfaces using mean-field theory.
  • Analyze effects of salt concentration, surface affinity, and electrostatic potential on wettability.

Main Methods:

  • Inhomogeneous mean-field theory applied to coacervate wetting.
  • Analysis of wetting transitions (off-coexistence) and contact angles (on-coexistence).

Main Results:

  • Coacervates typically exhibit first-order wetting transitions; second-order transitions occur above a surface critical point.
  • Electrostatic potential enhances wettability for symmetric surface affinities.
  • Asymmetric affinities show nonmonotonic wettability dependence on applied potential.

Conclusions:

  • Mean-field theory effectively models coacervate wetting phenomena.
  • Surface wettability is tunable via electrostatic potential and surface affinity.
  • Results provide insights for designing coacervate-based materials.