Related Experiment Video
Updated: Aug 10, 2026

Microscale Vortex-assisted Electroporator for Sequential Molecular Delivery
Published on: August 7, 2014
Porous glass electroosmotic pumps: theory
1Department of Mechanical Engineering, Stanford University, Stanford, CA 94305, USA.
Abstract:
This paper presents an analytical study of electroosmotic (EO) pumps with porous pumping structures. We have developed an analytical model to solve for electroosmotic flow rate, pump current, and thermodynamic efficiency as a function of pump pressure load for porous-structure EO pumps. The model uses a symmetric electrolyte approximation valid for the high-zeta-potential regime and numerically solves the Poisson-Boltzmann equation for charge distribution in the idealized pore geometry. Generalized scaling of pumping performance is discussed in the context of a parameterization that includes porosity, tortuosity, pore size, bulk ionic density, and the nonuniform conductivity distribution over charge layers. The model also incorporates an approximate ionic-strength-dependent zeta potential formulation.
Related Concept Videos
Osmosis and Osmotic Pressure of Solutions
ATP Driven Pumps II: P-type Pumps
A typical P-type pump has three cytosolic domains: nucleotide-binding (N), phosphorylation (P), and activator (A) domains. These domains are connected to the membrane-spanning helices by short amino acid segments. ATP hydrolysis and covalent phosphoenzyme intermediate formation are crucial parts of the catalytic cycle. At the highly...
Potentiometry: Membrane Electrodes
Capillary Exchange
Osmotic Pressure
Theory of Strong Electrolytes

