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Proceedings Paper

Design of a microfluidic cell using microstereolithography for electronic tongue applications
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Paper Abstract

In this paper we present design, fabrication and integration of a micro fluidic cell for use with the electronic tongue. The cell was machined using microstereo lithography on a Hexanediol Diacrylate (HDDA) liquid monomer. The wet cell was designed to confine the liquid under test to the sensing area and insure complete isolation of the interdigital transducers (IDTs). The electronic tongue is a shear horizontal surface acoustic wave (SH-SAW) device. Shear horizontally polarized Love-waves are guided between transmitting and receiving IDTs, over a piezoelectric substrate, which creates an electronic oscillator effect. This device has a dual delay line configuration, which accounts for the measuring of both mechanical and electrical properties of a liquid, simultaneously, with the ability to eliminate environmental factors. The data collected is distinguished using principal components analysis in conjunction with pre-processing parameters. The experiments show that the micro fluidic cell for this electronic tongue does not affect the losses or phase of the device to any extent of concern. Experiments also show that liquids such as Strawberry Hi-C, Teriyaki Sauce, DI Water, Coca Cola, and Pepsi are distinguishable using these methods.

Paper Details

Date Published: 22 July 2003
PDF: 7 pages
Proc. SPIE 5055, Smart Structures and Materials 2003: Smart Electronics, MEMS, BioMEMS, and Nanotechnology, (22 July 2003); doi: 10.1117/12.497446
Show Author Affiliations
Stefany L. Jacesko, The Pennsylvania State Univ. (United States)
Taeksoo Ji, The Pennsylvania State Univ. (United States)
Jose K. Abraham, The Pennsylvania State Univ. (United States)
Vijay K. Varadan, The Pennsylvania State Univ. (United States)
Julian W. Gardner, Univ. of Warwick (United Kingdom)

Published in SPIE Proceedings Vol. 5055:
Smart Structures and Materials 2003: Smart Electronics, MEMS, BioMEMS, and Nanotechnology
Vijay K. Varadan; Laszlo B. Kish, Editor(s)

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