Self-Charging Dual-Modal Sensor for Glucose Monitoring Based on Piezoelectric Nanowire/Microgel Hybrid Film

Date

2023-01-01

Author

Kim, Hyojung
Nam, Seunghyeon
Durukan, Mete Batuhan
Ünalan, Hüsnü Emrah
Lee, Hyunjoo J.

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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Continuous monitoring of bio/physiological signals will play an essential role in personalized, patient-centric medicine in the future healthcare industry. One of the challenges involves providing a sustainable, energy-efficient operation for long-term monitoring devices. The current technology based on power sources requires periodic replacement. Here, a hybrid film composed of a layer of piezoelectric nanowire (PVDFHFP) and a layer of microgel (pNIPAM-APBA) is presented that continuously monitors glucose, does not rely on enzymes, is self-charging, and decouples changes in read-out signals due to glucose detection from the force is applied to activate self-charging. By characterizing self-charging/discharging properties, the operation and sensing mechanism for the nanowire/microgel hybrid film are proposed. A reasonable sensitivity of 70 mV mm−1 with a high linearity value of R2 = 0.9956 is observed. This work demonstrates the potential for use in a self-charging wearable platform that enables continuous monitoring of bio/physiological signals.

Subject Keywords

dual-modality, glucose, microgels, piezoelectric nanowire, self-charging

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85175583711&origin=inward
https://hdl.handle.net/11511/106081

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Department of Metallurgical and Materials Engineering, Article