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Creators/Authors contains: "Oh, Eungyoul"

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  1. ; ; ; ; ; ; (, ACS Materials Letters)
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  2. ; ; ; ; ; (, 2021 21st International Conference on Solid-State Sensors, Actuators and Microsystems (Transducers))
    Continuous monitoring of biochemical information is critical for health management. Hydrogel, a synthetic material that exhibits volumetric response to target stimuli, is an attractive material for such applications. However, wireless readout of the hydrogel's response over a longer distance, while maintaining the small sensor dimension has been challenging. In this work we present ferrogel-based wireless acousto-biochemical sensing system with small dimension (length: 7.5 mm, diameter: 2 mm) and long sensing distance (>10 cm). The sensor utilizes ferromagnetic hydrogel to convert pH to the change in resonance frequency; the wireless measurement is made through the RF signal emission under ultrasonic excitation. 
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