The characterization of nanoparticles is a branch of nanometrology that deals with the characterization, or measurement, of the physical and chemical properties of nanoparticles. Nanoparticles measure
Nanoparticles differ in their physical properties such as size, shape, and dispersion, which must be measured to fully describe them.
An ultraviolet–visible spectrophotometer can provide information about concentration, size, and shape.
Nanoparticles with different particle sizes can have different physical properties. For example, gold nanoparticles of different sizes appear as different colors.
Dispersion is the degree to which particles clump together into weakly bound agglomerates (pictured) or strongly bound aggregates.
Dispersity
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ĐM = Mw/Mnwhere Mw is the mass-average molar mass andMn is the number-average molar mass.
A non-uniform (polydisperse) collection