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Coaxial fiber organic electrochemical transistor with high transconductance

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Abstract

Fiber organic electrochemical transistors (OECTs) have received extensive attention in wearable and implantable biosensors because of their high flexibility and low working voltage. However, the transconductance of fiber OECTs is much lower compared with the planar counterparts, leading to low sensitivity. Here, we developed fiber OECTs in a coaxial configuration with microscale channel length to achieve the highest transconductance of 135 mS, which is one to two orders of magnitude higher than that of the state-of-the-art fiber OECTs. Coaxial fiber OECT based sensors showed high sensitivities of 12.78, 20.53 and 3.78 mA/decade to ascorbic acid, hydrogen peroxide and glucose, respectively. These fiber OECTs were woven into a fabric to monitor the glucose in sweat during exercise and implanted in mouse brain to detect ascorbic acid. This coaxial architectural design offers an effective way to promote the performance of fiber OECTs and realize highly sensitive detection of biochemicals.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (NSFC, Nos. 52122310 and 22075050), Science and Technology Commission of Shanghai Municipality (STCSM, Nos. 21511104900 and 20JC1414902), China Postdoctoral Science Foundation (CPSF, Nos. VLH1717003, KLH1717015), Shanghai Municipal Science and Technology Major Project (No. 2018SHZDZX01), ZJ Lab, and Shanghai Center for Brain Science and Brain-Inspired Technology.

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

    Yuan Fang, Jianyou Feng, Xiang Shi, Yiqing Yang, Jiajia Wang, Xiao Sun, Wenjun Li, Xuemei Sun & Huisheng Peng

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  1. Yuan Fang
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  2. Jianyou Feng
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  3. Xiang Shi
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  7. Wenjun Li
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  8. Xuemei Sun
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  9. Huisheng Peng
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Correspondence to Xuemei Sun or Huisheng Peng.

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Fang, Y., Feng, J., Shi, X. et al. Coaxial fiber organic electrochemical transistor with high transconductance. Nano Res. 16, 11885–11892 (2023). https://doi.org/10.1007/s12274-023-5722-y

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