AC electrokinetic pumping on symmetric electrode arrays

作者：Yang Hukun; Jiang Hongyuan; Ramos Antonio; Garcia Sanchez Pablo^*

来源：Microfluidics and Nanofluidics, 2009, 7(6): 767-772.

DOI：10.1007/s10404-009-0434-5

• AC electroosmosis
• Micropumps
• Electrohydrodynamics

AC electro-osmotic (ACEO) pumping is experimentally demonstrated on a symmetric gold electrode array. Using asymmetric connection of electrodes to the applied AC voltage, spatial asymmetry along the array is created, which produces unidirectional flow of electrolyte. An aqueous solution of 100 mu M KCl is selected as the pumping fluid. The liquid velocity obtained as a function of voltage and frequency is compared to that generated using travelling-wave electroosmosis (TWEO) with the same electrode array. The expected velocities from the linear electrokinetic models of ACEO and TWEO are computed numerically. The comparison shows that TWEO generates greater velocity amplitudes and the streamlines are smoother than those generated by ACEO.

• 出版日期2009-12
• 单位哈尔滨工业大学