Heterogeneous surface charge confining an electrolyte solution
نویسندگان
چکیده
منابع مشابه
Extracting local surface charges and charge regulation behavior from atomic force microscopy measurements at heterogeneous solid-electrolyte interfaces.
We present a method to determine the local surface charge of solid-liquid interfaces from Atomic Force Microscopy (AFM) measurements that takes into account shifts of the adsorption/desorption equilibria of protons and ions as the cantilever tip approaches the sample. We recorded AFM force distance curves in dynamic mode with sharp tips on heterogeneous silica surfaces partially covered by gibb...
متن کاملModeling the surface charge evolution of spherical nanoparticles by considering dielectric discontinuity effects at the solid/electrolyte solution interface.
It is well known that the electrostatic repulsions between charges on neighboring sites decrease the effective charge at the surface of a charged nanoparticle (NP). However, the situation is more complex close to a dielectric discontinuity, since charged sites are interacting not only with their neighbors but also with their own image charges and the image charges of all neighbors. Titrating si...
متن کاملLattice Boltzmann Simulation of Electroosmotic Micromixing by Heterogeneous Surface Charge
Microelectroosmotic flow is usually restricted to low Reynolds number regime, and mixing in these microfluidic systems becomes problematic due to the negligible inertial effects. To gain an improved understanding of mixing enhancement in microchannels patterned with heterogeneous surface charge, the lattice Boltzmann method has been employed to obtain the electric potential distribution in the ...
متن کاملHeterogeneous surface charge enhanced micromixing for electrokinetic flows.
Enhancing the species mixing in microfluidic applications is key to reducing analysis time and increasing device portability. The mixing in electroosmotic flow is usually diffusion-dominated. Recent numerical studies have indicated that the introduction of electrically charged surface heterogeneities may augment mixing efficiencies by creating localized regions of flow circulation. In this stud...
متن کاملTransport Processes in Electrolyte Solution
(40) Where zi is the charge number of species i in the solution. Mass transfer arises either from the differences in electrical or chemical potential or from the movement of a volume element of the solution. It can occur due to: • Migration which is the movement of a charged body due to an electric field, i.e., an electrical potential gradient. The flux density of a species i in the solution du...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Journal of Chemical Physics
سال: 2020
ISSN: 0021-9606,1089-7690
DOI: 10.1063/5.0006208