Editing Dispersion (materials science)

In [[materials science]], '''dispersion''' is the fraction of atoms of a material exposed to the surface.  In general, ''D'' = ''N''<sub>S</sub>/''N'', where ''D'' is the dispersion, ''N''<sub>S</sub> is the number of surface atoms and ''N''<sub>T</sub> is the total number of atoms of the material.<ref>{{Citation|last=Bergeret|first=Gérard|title=Particle Size and Dispersion Measurements|date=2008|url=https://hal.archives-ouvertes.fr/hal-00308909/file/Bergeret2008.pdf|work=Handbook of Heterogeneous Catalysis|pages=738–765|publisher=American Chemical Society|language=en|doi=10.1002/9783527610044.hetcat0038|isbn=978-3-527-61004-4 |last2=Gallezot|first2=Pierre}}</ref> It is an important concept in heterogeneous [[catalysis]], since only atoms exposed to the surface can affect catalytic surface reactions. Dispersion increases with decreasing crystallite size and approaches unity at a crystallite diameter of about 0.1&nbsp;nm.

==See also==
* [[Emulsion dispersion]]

==References==
{{reflist}}

[[Category:Materials science]]


{{Materials-sci-stub}}