Cited by 162Gas Sensing Nanomaterials and SensorsAdvanced Sensor and Energy Harvesting MaterialsElectrochemical sensors and biosensors

A Self‐Powered, Rechargeable, and Wearable Hydrogel Patch for Wireless Gas Detection with Extraordinary Performance

Open access
Wu, Zixuan, Wang, Hao, Ding, Qiongling, Tao, Kai, Shi, Wenxiong, Liu, Chuan, Chen, Jun, Wu, Jin·2023·Advanced Functional Materials

Abstract

Flexible gas sensors play an indispensable role in diverse applications spanning from environmental monitoring to portable medical electronics. Full wearable gas monitoring system requires the collaborative support of high‐performance sensors and miniaturized circuit module, whereas the realization of low power consumption and sustainable measurement is challenging. Here, a self‐powered and reusable all‐in‐one NO 2 sensor is proposed by structurally and functionally coupling the sensor to the battery, with ultrahigh sensitivity (1.92%/ppb), linearity ( R 2 = 0.999), ultralow theoretical detection limit (0.1 ppb), and humidity immunity. This can be attributed to the regulation of the gas reaction route at the molecular level. The addition of amphiphilic zinc trifluoromethanesulfonate (Zn(OTf) 2 ) enables the H 2 O‐poor inner Helmholtz layer to be constructed at the electrode–gel interface, thereby facilitating the direct charge transfer process of NO 2 here. The device is then combined with a well‐designed miniaturized low‐power circuit module with signal conditioning, processing and wireless transmission functions, which can be used as wearable electronics to realize early and remote warning of gas leakage. This study demonstrates a promising way to design a self‐powered, sustainable, and flexible gas sensor with high performance and its corresponding wireless sensing system, providing new insight into the all‐in‐one system of gas detection.

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Registry

Crossref · 10.1002/adfm.202300046

Cites

67 of 67 references verified0 citation errors · 0 not checkable

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  • The sensor has ultra-high sensitivity (1.92% ppb−1), very low theoretical LOD (0.1 ppb) and excellent NO2 selectivity.

    “The sensor has ultra-high sensitivity (1.92% ppb−1), very low theoretical LOD (0.1 ppb) and excellent NO2 selectivity.”
  • The sensor works even in complex environments such as stretching, bending, sub-zero, and high humidity.

    “It works even in complex environments such as stretching, bending, sub-zero, and high humidity environment.”
  • The authors assembled the sensor with miniaturized circuit modules and successfully built a self-powered integrated wireless NO2 monitoring system for real-time and remote gas detection.

    “The authors also assembled it with miniaturized circuit modules, as shown in the Fig. 8g, and successfully built a self-powered integrated wireless NO2 monitoring system for real-time and remote gas detection.”
  • Wu et al. [214] constructed a self-powered flexible NO2 sensor using the structure of Zn(OTf)2/PAM hydrogel-Carbon.

    “Wu et al. [214] constructed a novel self-powered flexible NO2 sensor using the structure of Zn-zinc trifluoromethanesulfonate (Zn(OTf)2)/PAM hydrogel-Carbon, as demonstrated in Fig. 8f.”

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Authors
Wu, Z., Wang, H., Ding, Q., Tao, K., Shi, W., Liu, C., Chen, J., & Wu, J.
Affiliations
  • Sun Yat-sen University (CN)
  • Northwestern Polytechnical University (CN)
  • Tianjin University of Technology (CN)
Corresponding author
Wu, Jin
Venue
Advanced Functional Materials
Publisher
Wiley
Published
2023-02-17
Volume
33
Issue
21
ISSN
  • 1616-301X (ISSN-L)
  • 1616-3028
OpenAlex
W4321327816
Cited by
162
References
67
Citations by year
2026: 32 · 2025: 53 · 2024: 47 · 2023: 30
FWCI
12.03
Type
journal article
Language
en
Open access
Locations
Advanced Functional Materials (publishedVersion)
Funders
  • Fundamental Research Funds for the Central Universities (22lgqb17)
  • National Natural Science Foundation of China (61801525)
Topics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Gas Sensing Nanomaterials and Sensors
  • Physical Sciences › Engineering › Biomedical Engineering › Advanced Sensor and Energy Harvesting Materials
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Electrochemical sensors and biosensors
Keywords
flexible gas sensors, NO2 gas sensing, hydrogel patch, self-powered sensing, rechargeable batteries, wearable electronics, zinc trifluoromethanesulfonate, inner Helmholtz layer

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