October 2009
Intermediate to advanced
503 pages
14h 28m
English
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13.3 Chemical properties
Nanocrystalline materials are strong, hard, wear resistant, erosion and corrosion resistant. They are chemically active and have the following chemical properties.
(a) The nanostructures in chemistry are colloids and these are formed in a condensed phase having sizes in the range from 1 to 100 nm. Nanoscale catalysts have a high degree of dispersion, and this maximizes the contact area of a catalyst with the reactant.
(b) The effect of nanoscale materials on chemical reactivity: Changes in chemical reactivity of nanoscale materials have been expected. Chemical reactions are governed by electrons, electron affinities [or ionizational potential] and electron orbital densities. Coupling exists between chemical reactivity ...