Colloids and Interfaces | |
Failure of Debye-Hückel Screening in Low-Charge Colloidal Suspensions | |
Shafiq, Mohamad Danial1  Waggett, Franceska2  | |
[1] Author to whom correspondence should be addressed;School of Chemistry, University of Bristol, Bristol BS8 1TS, UK | |
关键词: electrostatics; DLVO; optical manipulation; | |
DOI : 10.3390/colloids2040051 | |
学科分类:物理化学和理论化学 | |
来源: mdpi | |
【 摘 要 】
Derjaguin–Landau–Verwey–Overbeek (DLVO) theory remains the cornerstone of colloid stability. Electrostatic interactions dominate van der Waals attractions at large colloid-colloid separations h, unless strongly screened. Under these conditions, the potential U ( h ) between charged colloids is expected to be exponentially screened, U ( h ) ∼ exp ( − κ h ) / h, withκ− 1 =λ Dwhere λ D is the classical Debye-Hückel screening length. By measuring the force between individual charged particles at dilute electrolyte concentrations (
CC BY 【 授权许可】
【 预 览 】
Files
Size
Format
View
RO201910251275528ZK.pdf
380KB
PDF
download