Colloidal systems

Abstract

Types of colloids, the formation and stabilization of colloids, and examples of colloids in paints and clay drilling muds.

Pursuing the Crystallization of Mono- and Polymetallic Nanosized Crystalline Inorganic Compounds by Low-Temperature Wet-Chemistry and Colloidal Routes

“…The colloidal state, the “neglected dimension” masterly described by Wolfgang Ostwald, is probably one of most fascinating and multifaceted, though still largely neglected, states of matter. ,− ,− From the chemical point of view, by mastering the bewitching potentials of the colloidal state, it turns out that colloidal-based methods are among the most appealing routes for the low-temperature preparation of inorganic colloids. In fact, the complex interplay among the different experimental parameters involved (nature of dispersing and dispersed phase, chemical nature and structure of the surfactant(s)/ligands/structure-directing agent(s), temperature, pH, concentration of the reactants, possible presence of electrolytes, etc.)…”

“…represents a fertile and multifaceted playground for the targeted growth of nanocrystals, enabling, in the above-mentioned mild conditions, fine control on the very early stages of nanostructure formation (i.e., nucleation and growth). The role of the different parameters involved in affecting the stability of the resulting colloidal dispersion, as well as the size and polydispersity of the obtained nanostructures, has been the topic of different investigations. ,,,,− ,,− …”

Perspectives on Multiscale Colloid-Based Materials for Biomedical Applications

“…Colloidal systems, also known as colloids, are a state of subdivision such that the molecules or polymolecular particles dispersed in a medium at least one dimension between approximately 1 nm and 1 μm or that system discontinuities are found at distances on that order . Colloids can be classified based on the nature of the dispersed phase and the continuous phase . Some common types of colloidal systems include a sol (solid is dispersed in liquid), gel (liquid is dispersed in solid), aerosol (solid is dispersed in gas), foam (gas is dispersed in solid or liquid), and emulsion (liquid is dispersed in another immiscible liquid).…”

Gelation in mixtures of polymers and bidisperse colloids

“…Colloidal suspensions with attractive interparticle interactions are widely employed in technological processes, including inkjet printing [1,2], direct write assembly [3,4], coatings [5], catalyst synthesis [6], ceramic devices [7], drug delivery [8,9], and crude oil recovery [10][11][12]. The practical need to controllably tune suspension microstructural and flow properties demands a thorough understanding of the phase behavior of attractive suspensions and hence has inspired studies spanning a wide range of system parameters [13][14][15][16][17][18].…”