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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
SH-SAW biosensor device used in this study. (a) Schematic of the top view and cross section; (b) picture of the sensor device. Only the sensing areas and reflectors are exposed; the other parts are covered with black epoxy resin.