Fig. 4.
Experimental results illustrating the controllability and tunability of our acoustofluidic pump. (a) Comparison of generated pumping flow rates with various tilting angles of sharp-edge structures as a function of the voltages applied to the piezoelectric transducer. The 30° tilted sharp-edge structures could generate a flow rate as high as 8 μl/min under 50 VPP. (b) Characterization of flow rate profiles when alternately switching the piezoelectric transducer ON and OFF with different burst frequencies: (Black) burst frequency of 2 Hz, and (Red) burst frequency of 0.5 Hz.