DataVXAdvanced MaterialsPaper
journal article·2025-06

Self‐Powered Switchable Gas‐Humidity Difunctional Flexible Chemosensors Based on Smart Adaptable Hydrogel

Qiongling Ding, Hao Wang, Yubin Zhou, Zhicheng Zhang, Yibing Luo, Zixuan Wu, Le Yang, Ruijie Xie, Bo‐Ru Yang, Kai Tao, Shaowu Pan, Fei Liu, Jun Fu, Fengwei Huo, Jin Wu

Advanced Materials· Volume 37· Issue 24
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Source abstract

Abstract

Abstract The development of self‐powered, flexible, and multi‐function sensors is highly anticipated in wearable electronics, however, it remains a daunting challenge to identify different signals based on a single device with singular sensing material without algorithmic support. Here, a smart adaptable hydrogel is developed by co‐introducing two ions with vastly different hydrophilicity for the construction of an electrochemically self‐powered, flexible, and reversibly switchable difunctional chemosensor with a metal‐air battery structure. The prepared hydrogel can readily switch between water‐rich and water‐deficient states for crosstalk‐free detection of oxygen and humidity respectively, since O2 gas and water molecules can directly participate in the oxygen reduction reaction in the device and act alone as limiting reactants and catalysts to affect the reaction rate under different hydrogel states. The resulting sensor demonstrates breakthrough O2 and humidity sensing performance with sensitivities as high as 4170.5%/% and 380.2%/% RH in water‐rich and water‐deficient states, respectively, and ultrawide detection ranges. Thanks to these, the devices can be applied for real‐time and remote monitoring of ambient oxygen, transcutaneous oxygen pressure changes, respiration, and skin moisture by combining with wireless communication technology, and therefore have important application prospects in the fields of safety, health management, and non‐contact human‐machine interaction.
Source: crossref · Quality: baseline

Research context

Energy storagePolymersCatalysis & surfaces

OpenAlex topics: Advanced Sensor and Energy Harvesting Materials · Gas Sensing Nanomaterials and Sensors · Conducting polymers and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Optoelectronic Materials and Technologies and the Guangdong Province Key Laboratory of Display Material and Technology School of Electronics and Information Technology Sun Yat‐sen University Guangzhou 510275 P. R. China

State Key Laboratory of Transducer Technology Shanghai 200050 P. R. China

Dongguan Key Laboratory of Advanced Drug Delivery and Biosensing Research and Development School of Pharmacy and Dongguan Innovation Institute Guangdong Medical University Dongguan 523808 China

Research Center of Flexible Sensing Materials and Devices School of Applied Physics and Materials Wuyi University Jiangmen 529020 P. R. China

Department of Oral and Maxillofacial Surgery Guanghua School of Stomatology Hospital of Stomatology Sun Yat‐sen University 56th Lingyuanxi Road Guangzhou Guangdong 510055 P. R. China

Guangdong Province Key Laboratory of Stomatology No. 74, 2nd Zhongshan Road Guangzhou Guangdong 510080 China

The Institute of Flexible Electronics (IFE Future Technologies) Xiamen University Xiamen Fujian 361102 P. R. China

The Ministry of Education Key Laboratory of Micro and Nano Systems for Aerospace School of Mechanical Engineering Northwestern Polytechnical University Xi'an 710072 P. R. China

State Key Laboratory of Advanced Fiber Materials College of Materials Science and Engineering Donghua University Shanghai 201620 P. R. China

School of Materials Science and Engineering Sun Yat‐sen University Guangzhou 510275 P. R. China

State Key Laboratory of Flexible Electronics (LoFE) & Institute of Advanced Materials (IAM) School of Flexible Electronics (Future Technologies) Nanjing Tech University (Nanjing Tech) Nanjing 211816 P. R. China

Funding

National Natural Science Foundation of China · National Key Research and Development Program of China

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