A. Baracu, A. Gurban, I. Giangu, F. Craciunoiu, V. Buiculescu, A. Dinescu, R. Muller, L. Rotariu, C. Bala, Cristina Mitrea
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Selective chemical sensor for liquid specimens based on lithium tantalate surface acoustic wave devices
We report in this paper the fabrication and characterization of a 121 MHz delay-line SAW device selective chemical sensor micro-fabricated on 36° rotated Y-cut X-propagating LiTaO3. A custom designed test fixture was manufactured for RF measurements. The proof of the sensor concept was based on detection of high molecular weight targets in liquid samples. Thus, the antigen-antibody label-free interaction was studied by monitoring the variation of the angle phase of SAW sensor with the concentration of some target biological analyte.
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