1. A Hydrogel-Based Ultrasonic Backscattering Wireless Biochemical Sensing
- Author
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Juhong Nam, Hyunji Shim, Moonchul Park, Seung Hyun Song, Eunjeong Byun, Albert Kim, Sayemul Islam, and Esther Kim
- Subjects
0301 basic medicine ,ultrasonic ,Histology ,Materials science ,lcsh:Biotechnology ,Biomedical Engineering ,Bioengineering ,02 engineering and technology ,Substrate (electronics) ,03 medical and health sciences ,Thin glass ,lcsh:TP248.13-248.65 ,Wireless ,wireless sensing ,Original Research ,biochemical sensing ,Ph level ,business.industry ,Ultrasound ,Bioengineering and Biotechnology ,Ultrasonic backscattering ,021001 nanoscience & nanotechnology ,030104 developmental biology ,Transducer ,implantable sensor devices ,Optoelectronics ,Ultrasonic sensor ,hydrogel ,0210 nano-technology ,business ,Biotechnology - Abstract
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.
- Published
- 2020
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