Fabrication of micro-fluidic devices on piezoelectric substrate by help of starch

Abstract

A new method for fabricating microfluidic device on a piezoelectric substrate is presented. Wires are pasted by mushy starch and heated in a thermotank for microchannel patterns, which is then lightly placed in a small groove. Polydimethylsiloxane (PDMS) is filled in the small groove. The wires are drawn off after PDMS has been solidified. The PDMS microfluidic channel is then mounted on the piezoelectric substrate. Fluidic transportation and dilution operation are demonstrated for verifying the function of the microfluidic device. Results show that 6uL red ink droplet can be transported and diluted in the channels at 27.8dBm electric signal power.

Keywords:

• Surface acoustic wave
• Microfluidic device
• Transportation
• Interdigital transducer
• Dilution

Additional information

Funding

This work was partly supported K.C.Wang Magna Fund, Ningbo University, Zhejiang Provincial Natural Science Foundation of China Under Grant No.LY17F050004, and Talent Fund of Wuyi University under Grant No.YJ201809.