Dispersion (materials science)

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In materials science, dispersion is the fraction of atoms of a material exposed to the surface. In general:


where D is the dispersion, NS is the number of surface atoms and NT is the total number of atoms of the material.[1] Dispersion is an important concept in heterogeneous catalysis, since only atoms that are exposed to the surface are able to play a role in catalytic surface reactions. Dispersion increases with decreasing crystallite size and approaches unity at a crystallite diameter of about 0.1 nm.

Related article[edit]

Emulsion dispersion


  1. ^ Bergeret, Gérard; Gallezot, Pierre (2008), "Particle Size and Dispersion Measurements", Handbook of Heterogeneous Catalysis, American Cancer Society, pp. 738–765, doi:10.1002/9783527610044.hetcat0038, ISBN 978-3-527-61004-4, retrieved 2021-09-25