Sols are lyophobic (solvent hating) suspensions of solid particles (1-1000 nanometres in size) in a liquid. A solvent is a liquid that dissolves a solid, liquid, or gaseous solute, resulting in a solution. ... Flour suspended in water In chemistry, a suspension is a dispersion (mixture) in which a finely-divided species is combined with another species, with the former being so finely divided and mixed that it doesnt rapidly settle out. ... A solid is a phase of matter, characterized by resistance to deformation and changes of volume. ... A nanometre (American spelling: nanometer, symbol: nm) is 1. ... A liquid will assume the shape of its container. ...

Sols may be prepared by dispersion or condensation. Dispersion techniques include grinding solids to colloidal dimensions in a ball mill (dry or wet) and Beidig's arc method. Condensation or precipitation methods work by making the colloidal particle come out of solution into the colloidal phase, either by adding a precipitating agent (salt) or by changing the temperature. The stability of sols may be maintained by using dispersing agents. In general, a colloid or colloidal dispersion is a two-phase system of matter; a type of mixture intermediate between homogeneous mixtures and heterogeneous mixtures. ... A ball mill, a type of crusher, is a cylindrical device used to grind (or mix) materials like ores, chemicals, ceramics and paints. ...

Sols are commonly used in preparing sol gels. Sol gel is an inorganic, catalytic silicon oxide gel, used for its negative tone photosensitive properties. ...