Experimental Study of Electrolyte Dependence of Ac Electroosmotic Pumps
نویسندگان
چکیده
Recent studies indicate increased efficiency of microfluidic ac electro-osmotic pumps by utilizing broken symmetries with raised steps on the electrodes. An experimental study on the dependence of ac electroosmosis in microchannels on solution chemistry for the new fast aceo stepped pumps is reported. Micro PIV was used to determine peak velocities for M mM ! " concentrations of KCl, NaCl, CaCl2 and MgCl2 in a pumping loop for a spectrum (1 kHz100 kHz) of frequency for applied voltage. Experiments demonstrate significant variations in ACEO pumping upon varying salt concentration or ionic species, suggesting the need for further experimental and theoretical study for better design of biomedical microfluidic devices.
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