Nanoparticle Near-Surface Electric Field

Nanoscale Research Letters
Levan Chkhartishvili

Abstract

Theoretical studies show that surface reconstruction in some crystals involves splitting the surface atomic layer into two-upper and lower-sublayers consisting of atoms with only positive or only negative effective electric charges, respectively. In a macroscopic crystal with an almost infinite surface, the electric field induced by such a surface-dipole is practically totally concentrated between the sublayers. However, when the material is powdered and its particles are of sufficiently small sizes, an electric field of a significant magnitude can be induced outside the sublayers as well. We have calculated the distribution of the electric field and its potential induced at the surface of a disc-shaped particle. The suggested novel nanoscale effect explains the increase in physical reactivity of nanopowders with decreasing particle sizes.

References

Dec 20, 2012·Journal of Physics. Condensed Matter : an Institute of Physics Journal·G J Slotman, A Fasolino
Apr 4, 2015·Physical Review Letters·Yoshiyuki MiyamotoAngel Rubio

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