Paper Based Microfluidic Device Using Surface Acoustic Wave as Driving Source
It is necessary to implement pretreatment operations for a paper based microfluidic device. A paper based microfluidic device with SAW driving microfluid has been implemented. Trance analyte to be detected was absorbed into a filter paper at first, and mounted on PDMS blocks on a piezoelectric substrate to ensure that the indicting filter paper has a little gap with the piezoelectric substrate. Reagents were then pipetted on the piezoelectric substrate and transported by surface acoustic wave excited by an interdigital transducer, which was fabricated on a 1280-yx LiNbO3 using micro-electrical technology. A color was developed due to chemical reaction, and the analyte concentration was evaluated by its grey value. Nitrate ion was detected using the microfluidic system.
A. L. Zhang and Q. J. Han, "Paper Based Microfluidic Device Using Surface Acoustic Wave as Driving Source", Applied Mechanics and Materials, Vols. 130-134, pp. 1658-1662, 2012