Hydrogel- and organohydrogel-based stretchable, ultrasensitive, transparent, room-temperature and real-time NO 2 sensors and the mechanism
Abstract
Highly stretchable, transparent, ultrasensitive, selective and room-temperature NO 2 sensors are created by using ion-conductive hydrogels/organohydrogels. The electrodes play a key role in sensing performances and NO 2 tend to react at the cathode.
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Recent studies have reported the use of hydrogels as the sensitive material for gas-sensing applications such as NO2, NH3, CO2, and O2.
“Recent studies have reported the use of hydrogels as the sensitive material for gas-sensing applications, such as NO2, NH3, CO2, and O2”
From Functionalized Hydrogel-Based Wearable Gas and Humidity Sensors. (2023) · cites this paper as [69]
The CuSn anode displays better corrosion resistance than the Ag anode, leading to a prolonged lifespan.
“In addition to the increased sensitivity, the CuSn anode displays better corrosion resistance than that with the Ag anode, leading to a prolonged lifespan.”
From Functionalized Hydrogel-Based Wearable Gas and Humidity Sensors. (2023) · cites this paper as [69]
The sensor features excellent selectivity for NO2 and still works well at 50% tensile strain.
“The sensor also features excellent selectivity for NO2 and still works well at 50% tensile strain.”
From Functionalized Hydrogel-Based Wearable Gas and Humidity Sensors. (2023) · cites this paper as [69]
The authors implemented wireless sensing of NO2 by collecting and processing data from real-time monitoring; when NO2 concentration exceeds the threshold, both the smartphone and the alarm system give an early warning.
“Even further, the authors implemented wireless sensing of NO2 by collecting and processing data from real-time monitoring. When the concentration of NO2 exceeds the threshold, both the smartphone and the alarm system will give an early warning, as shown in Fig. 8d.”
From Functionalized Hydrogel-Based Wearable Gas and Humidity Sensors. (2023) · cites this paper as [69]
The sensor can withstand 1,400% tensile strain due to its unique DN structure, exhibits a high sensitivity of 60.02% ppm−1 and an ultralow LOD of 6.8 ppb NO2.
“The sensor can not only withstand 1,400% tensile strain due to its unique DN structure, but also exhibits a high sensitivity of 60.02% ppm−1 and the ultralow LOD of 6.8 ppb NO2.”
From Functionalized Hydrogel-Based Wearable Gas and Humidity Sensors. (2023) · cites this paper as [69]
With Ag as cathode and Ag or CuSn as anode, replacing anodic Ag with CuSn alloy increased sensitivity from 31.18 to 60.02% ppm−1 due to stronger oxidation tendency of Cu and Sn.
“Figure 6g illustrates the increased sensitivity from 31.18 to 60.02% ppm−1 when anodic Ag was replaced with CuSn alloy owing to the stronger oxidation tendency of Cu and Sn; thus, the electrode material has a strong influence on the gas-sensing performance.”
From Functionalized Hydrogel-Based Wearable Gas and Humidity Sensors. (2023) · cites this paper as [69]
Wei et al. [69] prepared a NO2 gas sensor operating at room temperature using PAM/CArr DN hydrogel with active metal electrodes, with CaCl2 and Gly introduced to improve conductivity and mechanical deformability.
“Wei et al. [69] also prepared a NO2 gas sensor operating at room temperature using PAM/CArr DN hydrogel with active metal electrodes. CaCl2 and Gly were introduced to improve its conductivity and mechanical deformability as well.”
From Functionalized Hydrogel-Based Wearable Gas and Humidity Sensors. (2023) · cites this paper as [69]
Cites
Wu, J., Wu, Z., Xu, H., Wu, Q., Liu, C., Yang, B.-R., Gui, X., Xie, X., Tao, K., Shen, Y., et al. (2019) · Materials Horizons · doi:10.1039/c8mh01160e · Cited by 391 · see citing works
Self-citationWu, J., Wu, Z., Han, S., Yang, B.-R., Gui, X., Tao, K., Liu, C., Miao, J., & Norford, L. K. (2019) · ACS Applied Materials & Interfaces · doi:10.1021/acsami.8b17437 · Cited by 225 · see citing works
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Functionalized Hydrogel-Based Wearable Gas and Humidity Sensors.
Luo, Y., Li, J., Ding, Q., Wang, H., Liu, C., & Wu, J. (2023) · Nano-Micro Letters · doi:10.1007/s40820-023-01109-2 · Cited by 236 · see citing works
“Recent studies have validated the sensing process of hydrogel gas sensors [67, 69, 150, 206].”
BackgroundMethodSelf-citationHumidity Sensing of Stretchable and Transparent Hydrogel Films for Wireless Respiration Monitoring
Liang, Y., Ding, Q., Wang, H., Wu, Z., Li, J., Li, Z., Tao, K., Gui, X., & Wu, J. (2022) · Nano-Micro Letters · doi:10.1007/s40820-022-00934-1 · Cited by 162 · see citing works
Self-citationWu, Z., Ding, Q., Li, Z., Zhou, Z., Luo, L., Tao, K., Xie, X., & Wu, J. (2022) · Science China Materials · doi:10.1007/s40843-021-2022-1 · Cited by 42 · see citing works
Self-citation
- Authors
- Wei, Y., Wang, H., Ding, Q., Wu, Z., Zhang, H., Tao, K., Xie, X., & Wu, J.
- Affiliations
- Sun Yat-sen University (CN)
- South China University of Technology (CN)
- Northwestern Polytechnical University (CN)
- Corresponding author
- Wu, Jin
- Venue
- Materials Horizons
- Publisher
- Royal Society of Chemistry (RSC)
- Published
- 2022
- Volume
- 9
- Issue
- 7
- Pages
- 1921-1934
- ISSN
- 2051-6347 (ISSN-L)
- 2051-6355
- OpenAlex
- W4226065900
- Cited by
- 66
- References
- 2
- Citations by year
- 2026: 3 · 2025: 13 · 2024: 7 · 2023: 26 · 2022: 17
- FWCI
- 4.31
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Materials Horizons (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Natural Science Foundation of China (61801525)
- Basic and Applied Basic Research Foundation of Guangdong Province (2020A1515010693)
- Fundamental Research Funds for the Central Universities (22lgqb17)
- Guangzhou Municipal Science and Technology Project (201904010456)
- 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 › Materials Science › Polymers and Plastics › Conducting polymers and applications
- Keywords
- NO2 gas sensor, stretchable sensors, transparent sensors, hydrogels, organohydrogel, room-temperature sensing, real-time gas sensing, ultrasensitive detection, electrode design
- MeSH terms
- Electrodes, Nitrogen Dioxide, Temperature, Hydrogels
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