Surface Acoustic Wave Viscosity Sensor with Integrated Microfluidics on a PCB Platform

Burak Yildirim, Sukru U. Senveli, Rajapaksha W.R.L. Gajasinghe, Onur Tigli

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

This paper illustrates the extension of Rayleigh wave based surface acoustic wave (SAW) viscosity and density sensor previously developed by the authors to integration with microfluidics and printed circuit board (PCB) based electronics. The SAW device is first modeled with a microchannel and analyzed using finite element method (FEM). Precise fabrication, alignment and bonding of polydimethylsiloxane (PDMS) microchannels on diced Y-Z lithium niobate substrates are accomplished. A high frequency PCB is built to obtain better performance for SAW device testing. Low glycerin concentrations in deionized (DI) water are analyzed. FEM simulation results and vector network analyzer (VNA) measurements of the devices with the microchannel and PCB integration are presented. For low frequency SAW sensor, a sensitivity of 171.9 Hz/(% glycerin) or 5.57 kHz/(kg/m 2√ s) in frequency shifts, 0.09 ° /(% glycerin) or 2.92 ° /(kg/m 2√ s) in phase difference, and minimum signal-to-noise ratio of 13.9 dB are achieved at peak frequency of 29.7 MHz. On the other hand, high frequency (86.1 MHz) SAW sensor provides a sensitivity of 937.5 Hz/(% glycerin) or 37.15 kHz/(kg/m 2√ s) in absolute frequency shifts, 0.37 ° /(% glycerin) or 14.7 ° /(kg/m 2√ s) in phase difference, and minimum signal-to-noise ratio of 20.5 dB.

Original languageEnglish (US)
JournalIEEE Sensors Journal
DOIs
StateAccepted/In press - Jan 23 2018

Fingerprint

printed circuits
circuit boards
microchannels
Glycerol
Microfluidics
Printed circuit boards
Surface waves
surface acoustic wave devices
platforms
Acoustic waves
Viscosity
viscosity
Microchannels
frequency shift
acoustics
sensors
Sensors
finite element method
signal to noise ratios
Acoustic surface wave devices

Keywords

  • finite element method
  • liquid sensing
  • Liquids
  • Microchannels
  • microfluidics
  • PCB
  • Sensor phenomena and characterization
  • Substrates
  • Surface acoustic waves
  • Surface acoustic waves (SAWs)
  • Viscosity
  • viscosity sensor

ASJC Scopus subject areas

  • Instrumentation
  • Electrical and Electronic Engineering

Cite this

Surface Acoustic Wave Viscosity Sensor with Integrated Microfluidics on a PCB Platform. / Yildirim, Burak; Senveli, Sukru U.; Gajasinghe, Rajapaksha W.R.L.; Tigli, Onur.

In: IEEE Sensors Journal, 23.01.2018.

Research output: Contribution to journalArticle

Yildirim, Burak ; Senveli, Sukru U. ; Gajasinghe, Rajapaksha W.R.L. ; Tigli, Onur. / Surface Acoustic Wave Viscosity Sensor with Integrated Microfluidics on a PCB Platform. In: IEEE Sensors Journal. 2018.
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