Micro-Scale Electroosmotic Flow - Flow Field Measuring Micro-PIV

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Motivation

 

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Zeta Potential :
The potential at Stern plain is close to the electrokinetic potential or zeta potential, which is defined as the potential at the shear surface between the charge surface and the electrolyte solution.

The objective of the study is to initiate an interdisciplinary collaboration to develop microfluidic device technology for delivery and manipulation of fluids in biotechnology and biomedicine. Several techniques for tethered-probe sequencing have been perfected and are becoming widely used. All such techniques require a yet-missing enabling technology before they can be put into widespread use. A micro-scale fluidics array is an attractive answer to this challenge. To make the idea work, the micro-scale fluid flow must be understood and the piezoelectric (PZT) and electromostic pumping of micro-flows must be properly configured.

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Electro-Osmosis :
 The movement of liquid relative to a stationary charged surface by an applied electric field.
Mobile liquid, Stationay cell wall.

Electro-Phoresis :
The movement of a charged surface plus attached material relative to stationary liquid by an applied electric field.
Mobile particles, Stationary liquid.

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When a constant electric field is applied to a heterogeneous system consisting of a solid body(an insulator) contacting an electrolyte solution, a flow of the liquid known as electro-osmosis may develop.

 

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