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Multiplexed asymmetric Mach–Zehnder interferometer (aMZI) biosensor. (a) Photo of a chip; (b) layout scheme of the sensor chip: three sensors with an individual flow path and three with common flow path. (c) Close up image of three sensing elements, isolated by the soft acrylate sealing layer pressed above the aMZI. Adapted from [300]. Copyright (2020) with permission from Elsevier.
