Transport-Induced-Charge Electroosmosis

2021/07/30 by Wei‐Lun Hsu, Hsu, Wei-Lun, Zhixuan Wang +3
Engineering · #FOS: Physical sciences #Fluid Dynamics (physics.flu-dyn) #Microfluidic and Bio-sensing Technologies #Microfluidic and Capillary Electrophoresis Applications #Nanopore and Nanochannel Transport Studies

paper · pdf · doi:10.48550/arxiv.2108.02564

openalex publication_date 2021/07/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We report theoretical analysis of transport-induced-charge electroosmosis (TICEO) in a nanopore due to the presence of a local electric field and a conductivity gradient. TICEO shares a similar characteristic with classical induced-charge electroosmosis (ICEO) that the mean velocity v_TIC is proportional to the square of the applied electric potential difference Δψ, i.e., v_TIC ∝ (Δψ)², appropriate for alternating current (AC) pumping applications. In contrast to ICEO which is primarily used in microfluidics, TICEO does not require metallic or dielectric patches and is thus suitable for nanopore pumping, providing new opportunities for AC nanopore applications.

Related

• Electroosmosis in nanopores: Computational methods and technological applications
• Induced-charge electro-osmosis
• Coupled electrokinetic transport through a nanoporous membrane: effects of pore interactions
• Towards an understanding of induced-charge electrokinetics at large applied voltages in concentrated solutions
• Modulation of Electroosmotic Flow through Short Nanopores by Charged Exterior Surfaces