A Hydrogel-Based Ultrasonic Backscattering Wireless Biochemical Sensing
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Journal ArticleDate
2020-11-27Author
Nam, JByun, E
Shim, H
Kim, E
Islam, S
Park, M
Kim, A
Song, SH
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http://hdl.handle.net/20.500.12613/4643
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10.3389/fbioe.2020.596370Abstract
© Copyright © 2020 Nam, Byun, Shim, Kim, Islam, Park, Kim and Song. Wireless monitoring of the physio-biochemical information is becoming increasingly important for healthcare. In this work, we present a proof-of-concept hydrogel-based wireless biochemical sensing scheme utilizing ultrasound. The sensing system utilizes silica-nanoparticle embedded hydrogel deposited on a thin glass substrate, which presents two prominent interfaces for ultrasonic backscattering (tissue/glass and hydrogel/glass). To overcome the effect of the varying acoustic properties of the intervening biological tissues between the sensor and the external transducer, we implemented a differential mode of ultrasonic back-scattering. Here, we demonstrate a wireless pH measurement with a resolution of 0.2 pH level change and a wireless sensing range around 10 cm in a water tank.Citation to related work
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http://dx.doi.org/10.34944/dspace/4625