Nanoparticle Near-Surface Electric Field

作者：Chkhartishvili Levan^*

来源：Nanoscale Research Letters, 2016, 11(1): 48.

DOI：10.1186/s11671-016-1258-3

• Surface reconstruction
• Near-surface electric field
• Nanomaterial

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.

• 出版日期2016-2-1