Paper Title:
Study on Generation of Digital Micro-Fluids Based on Surface Acoustic Wave
  Abstract

The generation of digital micro-fluid is indispensable operation unit for lab-on-a-piezoelectric-substrate. A new generation method of digital micro-fluid is proposed in this paper. An interdigital transducer (IDT) and a reflector were fabricated on 1280 YX-LiNbO3 substrate, which was used to excited surface acoustic wave. A needle with 400um inside diameter connected with a syringe was on the piezoelectric substrate, of which space could be adjusted. The needle tip and the piezoelectric substrate were coated with Teflon AF 1600. Water was used to generate digital micro-fluid experiments due to most samples or reagents being water solution. Experimental results show that the volumes of generated digital micro-fluid are relied on the space between the needle tip and the piezoelectric substrate, contact angle of the needle tip and RF power acted on the IDT. When the flow velocity of the syringe being 2.269 mm/min, space between the needle tip and the substrate being 0.98mm and 34mdB RF signal power, the volume of the generated water digital micro-fluid is 2ul. Change the space and RF signal power, the volume of generated water digital micro-fluid is also different. The method of generating digital micro-fluid can be greatly useful for Lab-on-a-piezoelelctric-chips.

  Info
Periodical
Advanced Materials Research (Volumes 383-390)
Chapter
Chapter 20: Metrology and Measurement
Edited by
Wu Fan
Pages
5100-5105
DOI
10.4028/www.scientific.net/AMR.383-390.5100
Citation
Y. Q. Wei, A. L. Zhang, "Study on Generation of Digital Micro-Fluids Based on Surface Acoustic Wave", Advanced Materials Research, Vols. 383-390, pp. 5100-5105, 2012
Online since
November 2011
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Price
$32.00
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