Ion-Selective Mobility Differential Amplifier: Enhancing Pressure-Induced Voltage Response in Hydrogels

Kai Yang; Bolong Li; Zhihao Ma; Jiangang Xu; Dong Wang; Zhiheng Zeng; Derek Ho

doi:10.1002/anie.202415000

Ion-Selective Mobility Differential Amplifier: Enhancing Pressure-Induced Voltage Response in Hydrogels

Kai Yang, Bolong Li, Zhihao Ma, Jiangang Xu, Dong Wang, Zhiheng Zeng, Derek Ho^*

^*Corresponding author for this work

Department of Materials Science and Engineering

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

15 Citations (Scopus)

Abstract

Piezoionics is an emerging mechanical-electrical energy conversion paradigm that enables self-powered sensing systems for next-generation intelligent wearable electronics. However, there are currently no rational design approaches to enhance the stimulus response of piezoionic devices. Here, we present a strategy using crown ether as ion-selective mobility differential amplifiers for enhancing the pressure-induced voltage response in ionic polyvinyl alcohol (PVA) hydrogels. The crown ether grafted PVA (PVA-CE) hydrogel prototype achieves a 30-fold amplified piezoionic coefficient of 1490 nV Pa⁻¹ within 0–1 kPa, compared to 49 nV Pa⁻¹ of the unmodified PVA. The PVA-CE exhibits an ultra-low pressure detection limit of 0.2 Pa with a fast response time of 18.1 ms. Leveraging these properties, we further demonstrate arrayed pressure sensing with a PVA-CE piezoionic skin, analogous to the human somatosensory network. These capabilities hold great promises for emerging healthcare applications such as synthetic biology, soft robotics, and beyond. © 2024 Wiley-VCH GmbH

Original language	English
Article number	e202415000
Journal	Angewandte Chemie - International Edition
Volume	64
Issue number	2
Online published	15 Nov 2024
DOIs	https://doi.org/10.1002/anie.202415000
Publication status	Published - 10 Jan 2025

Funding

The authors gratefully acknowledge financial support provided by the Hong Kong University Grants Committee (CityU 11213222) and InnoHK Project at Hong Kong Centre for Cerebro-cardiovascular Health Engineering (COCHE). The author further acknowledges Ms. Yixue Duan (Sichuan University) and Dr. Cong Wu (City University of Hong Kong) for molecular dynamics and biocompatibility test supports, respectively.

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title = "Ion-Selective Mobility Differential Amplifier: Enhancing Pressure-Induced Voltage Response in Hydrogels",

abstract = "Piezoionics is an emerging mechanical-electrical energy conversion paradigm that enables self-powered sensing systems for next-generation intelligent wearable electronics. However, there are currently no rational design approaches to enhance the stimulus response of piezoionic devices. Here, we present a strategy using crown ether as ion-selective mobility differential amplifiers for enhancing the pressure-induced voltage response in ionic polyvinyl alcohol (PVA) hydrogels. The crown ether grafted PVA (PVA-CE) hydrogel prototype achieves a 30-fold amplified piezoionic coefficient of 1490 nV Pa−1 within 0–1 kPa, compared to 49 nV Pa−1 of the unmodified PVA. The PVA-CE exhibits an ultra-low pressure detection limit of 0.2 Pa with a fast response time of 18.1 ms. Leveraging these properties, we further demonstrate arrayed pressure sensing with a PVA-CE piezoionic skin, analogous to the human somatosensory network. These capabilities hold great promises for emerging healthcare applications such as synthetic biology, soft robotics, and beyond. {\textcopyright} 2024 Wiley-VCH GmbH",

author = "Kai Yang and Bolong Li and Zhihao Ma and Jiangang Xu and Dong Wang and Zhiheng Zeng and Derek Ho",

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doi = "10.1002/anie.202415000",

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journal = "Angewandte Chemie - International Edition",

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T1 - Ion-Selective Mobility Differential Amplifier

T2 - Enhancing Pressure-Induced Voltage Response in Hydrogels

AU - Yang, Kai

AU - Li, Bolong

AU - Ma, Zhihao

AU - Xu, Jiangang

AU - Wang, Dong

AU - Zeng, Zhiheng

AU - Ho, Derek

PY - 2025/1/10

Y1 - 2025/1/10

N2 - Piezoionics is an emerging mechanical-electrical energy conversion paradigm that enables self-powered sensing systems for next-generation intelligent wearable electronics. However, there are currently no rational design approaches to enhance the stimulus response of piezoionic devices. Here, we present a strategy using crown ether as ion-selective mobility differential amplifiers for enhancing the pressure-induced voltage response in ionic polyvinyl alcohol (PVA) hydrogels. The crown ether grafted PVA (PVA-CE) hydrogel prototype achieves a 30-fold amplified piezoionic coefficient of 1490 nV Pa−1 within 0–1 kPa, compared to 49 nV Pa−1 of the unmodified PVA. The PVA-CE exhibits an ultra-low pressure detection limit of 0.2 Pa with a fast response time of 18.1 ms. Leveraging these properties, we further demonstrate arrayed pressure sensing with a PVA-CE piezoionic skin, analogous to the human somatosensory network. These capabilities hold great promises for emerging healthcare applications such as synthetic biology, soft robotics, and beyond. © 2024 Wiley-VCH GmbH

AB - Piezoionics is an emerging mechanical-electrical energy conversion paradigm that enables self-powered sensing systems for next-generation intelligent wearable electronics. However, there are currently no rational design approaches to enhance the stimulus response of piezoionic devices. Here, we present a strategy using crown ether as ion-selective mobility differential amplifiers for enhancing the pressure-induced voltage response in ionic polyvinyl alcohol (PVA) hydrogels. The crown ether grafted PVA (PVA-CE) hydrogel prototype achieves a 30-fold amplified piezoionic coefficient of 1490 nV Pa−1 within 0–1 kPa, compared to 49 nV Pa−1 of the unmodified PVA. The PVA-CE exhibits an ultra-low pressure detection limit of 0.2 Pa with a fast response time of 18.1 ms. Leveraging these properties, we further demonstrate arrayed pressure sensing with a PVA-CE piezoionic skin, analogous to the human somatosensory network. These capabilities hold great promises for emerging healthcare applications such as synthetic biology, soft robotics, and beyond. © 2024 Wiley-VCH GmbH

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U2 - 10.1002/anie.202415000

DO - 10.1002/anie.202415000

M3 - RGC 21 - Publication in refereed journal

SN - 1433-7851

VL - 64

JO - Angewandte Chemie - International Edition

JF - Angewandte Chemie - International Edition

IS - 2

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ER -

Ion-Selective Mobility Differential Amplifier: Enhancing Pressure-Induced Voltage Response in Hydrogels

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GRF: Room-temperature High-performance Gas Sensors Based on Grafting of Functional Groups on MXene

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Ion-Selective Mobility Differential Amplifier: Enhancing Pressure-Induced Voltage Response in Hydrogels

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GRF: Room-temperature High-performance Gas Sensors Based on Grafting of Functional Groups on MXene

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