Flashcards: Colloidal chemistry

Amphiphile (from the Greek αμφις, amphis: both and φιλíα, philia: love, friendship) is a term describing a chemical compound possessing both hydrophilic (water-loving, polar) and lipophilic (fat-loving) properties.

A micelle (/maɪˈsɛl/) or micella (/maɪˈsɛlə/) (plural micelles or micellae, respectively) is an aggregate (or supramolecular assembly) of surfactant molecules dispersed in a liquid colloid.

Adsorption is the adhesion of atoms, ions, or molecules from a gas, liquid, or dissolved solid to a surface.

Brownian motion or pedesis (from Ancient Greek: πήδησις /pέːdεːsis/ "leaping") is the random motion of particles suspended in a fluid (a liquid or a gas) resulting from their collision with the fast-moving atoms or molecules in the gas or liquid.

An emulsion is a mixture of two or more liquids that are normally immiscible (unmixable or unblendable).

In chemistry, a solution is a homogeneous mixture composed of two or more substances.

In chemistry, a suspension is a heterogeneous mixture containing solid particles that are sufficiently large for sedimentation.

The viscosity of a fluid is a measure of its resistance to gradual deformation by shear stress or tensile stress.

A gel is a solid jelly-like material that can have properties ranging from soft and weak to hard and tough.

The Tyndall effect, also known as Tyndall scattering, is light scattering by particles in a colloid or else particles in a very fine suspension.

Colloidal gold is a sol or colloidal suspension of submicrometre-size nanoparticles of gold in a fluid, usually water.

Sedimentation is the tendency for particles in suspension to settle out of the fluid in which they are entrained and come to rest against a barrier.

Interface and colloid science is an interdisciplinary intersection of branches of chemistry, physics, nanoscience and other fields dealing with colloids, heterogeneous systems consisting of a mechanical mixture of particles between 1 nm and 1000 nm dispersed in a continuous medium.

Mycosubtilin is a natural lipopeptide with antifungal and hemolytic activities and isolated from Bacillus species.

Surfactin is a very powerful surfactant commonly used as an antibiotic.

Zeta potential is a scientific term for electrokinetic potential in colloidal dispersions.

The surfactant’s critical micelle concentration (CMC) plays a factor in Gibbs free energy of micellization.

Ammonium perfluorononanoate (APFN) is an anionic surfactant that in water forms liquid crystalline phases (Lyotropic liquid crystal).