This paper reports the first investigation of the dependence of AC electro-osmosis (ACEO) on the solution chemistry. It is argued that classical dilute-solution theory breaks down in ACEO, since the large applied voltage leads to ion crowding near the electrode surfaces. A modified theory is proposed with steric effects (finite ion sizes) and a charge-dependent viscoelectric effect, which predi...

Overview Membranes in the outer hair cell lateral wall form a naturally occurring nanostructure which acts as a microelectromechanical (MEM) system. Computational and optical techniques are being developed to predict, verify and refine the description of nanoscale behavior in the outer hair cell (OHC) lateral wall. The biological, engineering and physics expertise of an interdisciplinary three-...

We report a simple yet highly efficient chemical motor that can be controlled with visible light. The motor made from a noble metal and doped silicon acts as a pump, which is driven through a light-activated catalytic reaction process. We show that the actuation is based on electro-osmosis with the electric field generated by chemical reactions at the metal and silicon surfaces, whereas the con...

Electric fields are commonly used for manipulating particles and liquids in microfluidic systems. In this work, we report stationary electro-osmotic flow vortices around dielectric micropillars induced by ac electric electrolytes. The characteristics theoretically predicted based on the well-known phenomena of surface conductance concentration polarization a charged object. flows arise from two...

Electro-osmosis is the flow produced by the action of an electric field on a fluid with a net charge, which is created by the Zeta potential and confined in the Debye layer. This basic phenomenon in the electro-kinetic transport plays an important role in the microfluidic systems being explored today because it can be applied to a variety of MEMS devices. This paper presents global and point-wi...

The treatment of metal-contaminated sediment generated in environmental dredging projects often requires both reduction and remediation, the electric field has good application prospects integration remediation. In this study, based on electro-osmosis, vacuum, vacuum electro-osmosis methods, a detachable test system was made. Experiments three methods were carried out independently remediation ...

This work presents a finite volume method used to solve the relevant coupled equations for general electro-osmotic flows of viscoelastic fluids, using the upper-convected Maxwell and the simplified Phan-Thien–Tanner models. Three different implementations of the electro-osmosis physical models were carried out, which depend on the required level of approximation. In the first implementation, th...