Citation: Chen-Xin Wang, Guang-Lei Li, Yu Hang, Dan-Feng Lu, Jian-Qi Ye, Hao Su, Bing Hou, Tao Suo, Dan Wen. Shock-resistant wearable pH sensor based on tungsten oxide aerogel[J]. Chinese Chemical Letters, ;2025, 36(7): 110502. doi: 10.1016/j.cclet.2024.110502 shu

Shock-resistant wearable pH sensor based on tungsten oxide aerogel

Chen-Xin Wang ^{a, 1} ,
Guang-Lei Li ^{a, d, 1} ,
Yu Hang ^b ,
Dan-Feng Lu ^c ,
Jian-Qi Ye ^a ,
Hao Su ^a ,
Bing Hou ^b,, ,
Tao Suo ^b,, ,
Dan Wen ^a,,

a.
State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU), Xi'an 710072, China
b.
School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China
c.
Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an 710048, China
d.
State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Shanghai 200050, China

Corresponding author: Bing Hou, houbing@nwpu.edu.cn Tao Suo, suotao@nwpu.edu.cn Dan Wen, dan.wen@nwpu.edu.cn

houbing@nwpu.edu.cn

suotao@nwpu.edu.cn

dan.wen@nwpu.edu.cn

Received Date: 24 April 2024
Revised Date: 6 August 2024
Accepted Date: 24 September 2024
Available Online: 24 September 2024

Figures(4)

Wearable sensors are pivotal for point-of-care diagnostics, yet their application in extreme conditions is rarely conducted. In this work, we present a wearable pH sensor using tungsten oxide aerogel (TOA) as the sensing material. With the advantages of large specific surface area, high porosity and interconnected network structures, TOA not only provides excellent pH sensing performance but also demonstrates remarkable structural and sensing stability. The potentiometric pH sensor exhibits a high sensitivity (−63.70 mV/pH), a low detectable limit (0.05) and a superior stability (maintained over 50, 000 s). Integrated with a Bluetooth module, the wearable sensor achieves non-invasive and real-time pH monitoring on the human skin with minimal deviation (1.91%) compared to the commercial pH meter. More importantly, the anti-impact behaviors of the TOA-based sensing materials and chip, along with the pH wearable sensor on a pig exhibit an outstanding shock-resistance ability, with variations no more than 7.17% under an impact of 118.38 kPa. Therefore, this study shows great promise for the aerogel-based personalized health management in the extreme environment.
- Wearable pH sensor,
- Tungsten oxide aerogel,
- Shock-resistance,
- High stability,
- Potentiometric method
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沈阳化工大学材料科学与工程学院沈阳 110142