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 STYLE
Nam, J., Byun, E., Shim, H., Kim, E., Islam, S., Park, M., … Song, S. H. (2020). A Hydrogel-Based Ultrasonic Backscattering Wireless Biochemical Sensing. Frontiers in Bioengineering and Biotechnology, 8. https://doi.org/10.3389/fbioe.2020.596370
Mendeley helps you to discover research relevant for your work.