The relationship between inner surface potential and electrokinetic potential from an experimental and theoretical point of view

摘要: Environmental context Interfacial properties of colloid and nanoparticles are directly related to the reactivity surface densities existing sites. Surface characterisation particles provides only some kind average properties. Analysis well-defined monocrystal surfaces, which form single particle, leads a better understanding reactions mutual interactions adjacent crystal planes on Abstract The contact small solid macroscopic flat with aqueous electrolyte solutions results in accumulation ions at interface formation electrical interfacial layer. building blocks particles. We analyse inner potential (obtained by single-crystal electrode) zeta-potential data streaming measurements) that were obtained identical samples. Among systems for comparable zetapotentials available, measured sapphire (0001), haematite (0001) rutile (110) show expected behaviour based face-specific chemistry model, whereas slopes quartz do not. Isoelectric points (100) conflict standard model implies consistent diffuse layer potential. For two former systems, previous from literature suggest charge water can explain discrepancy. could also play role but this case, discrepancy would simply not be noticed, because both point zero isoelectric low. Along silver halides, it concluded six-ring structures solids may generate electrokinetic is typical inert surfaces like Teflon.