Charge regulation at semiconductor-electrolyte interfaces

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:449

Article

Fleharty, Mark E.¹  van Swol, Frank^1,2  Petsev, Dimiter N.¹ 

[1] Univ New Mexico, Dept Chem & Biol Engn, Albuquerque, NM 87131 USA

[2] Sandia Natl Labs, Albuquerque, NM 87185 USA

关键词: Semiconductor colloids;    Particle interactions;    Electric double layer;    Charge regulation;    Boltzmann distribution;    Fermi-Dirac distribution;   

DOI  :  10.1016/j.jcis.2014.12.058

来源: Elsevier

【 摘 要 】

The interface between a semiconductor material and an electrolyte solution has interesting and complex electrostatic properties. Its behavior will depend on the density of mobile charge carriers that are present in both phases as well as on the surface chemistry at the interface through local charge regulation. The latter is driven by chemical equilibria involving the immobile surface groups and the potential determining ions in the electrolyte solution. All these lead to an electrostatic potential distribution that propagate such that the electrolyte and the semiconductor are dependent on each other. Hence, any variation in the charge density in one phase will lead to a response in the other. This has significant implications on the physical properties of single semiconductor-electrolyte interfaces and on the electrostatic interactions between semiconductor particles suspended in electrolyte solutions. The present paper expands on our previous publication (Fleharty et al., 2014) and offers new results on the electrostatics of single semiconductor interfaces as well as on the interaction of charged semiconductor colloids suspended in electrolyte solution. (C) 2014 Elsevier Inc. All rights reserved.

【 授权许可】

Free