Large‐Scale Flexible Fabric Biosensor for Long‐Term Monitoring of Sweat Lactate

Author:

Chen Yangyang1,Hu Xiaokang1,Liang Qimin1,Wang Xin2,Zhang Huanlei2,Jia Kangkang1,Li Yuan1,Zhang Anning1,Chen Peining3,Lin Meng2,Qiu Longbin2,Peng Huisheng3,He Sisi1ORCID

Affiliation:

1. Shenzhen Key Laboratory of Flexible Printed Electronics Technology School of Science Harbin Institute of Technology (Shenzhen) University Town Shenzhen Guangdong 518055 China

2. SUSTech Energy Institute for Carbon Neutrality Department of Mechanical and Energy Engineering Southern University of Science and Technology Shenzhen Guangdong 518055 China

3. State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science and Laboratory of Advanced Materials Fudan University Shanghai 200438 China

Abstract

AbstractIntegrating sweat biosensors into daily wear has the potential to effectively monitor personal lactate levels, offering the advantages of convenience, precision, and multi‐point detection. However, existing wearable fabric sweat biosensors have limitations in terms of long‐term repeatable detection and washability due to the difficulty of building a stable layer of recognition materials on the highly curved fiber surface. Here, a long‐term repeatable and washable electrochemical fabric biosensor is reported based on a fiber electrode with multi‐scaled aligned channels for efficient and reliable lactate detection. Through the functionalization of a molecularly imprinted polymer with redox‐sensitive nano reporters, the fabric biosensor exhibits impressive in situ long‐term repeatable detection for more than 400 times, washability, and stability under deformations. The multi‐scaled channels contribute to a desired electric field distribution and thus a reliable interface between the polymer and the fiber. Employing industrial sewing technology, a 20 m (L)  ×  0.5 m (W) sensing fabric is further produced. Ultimately, combined with a wireless communication element, the fabric biosensing system can immediately track lactate levels.

Funder

National Natural Science Foundation of China

Basic and Applied Basic Research Foundation of Guangdong Province

Shenzhen Science and Technology Innovation Program

Publisher

Wiley

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