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In situ fabrication of organic electrochemical transistors on a microfluidic chip

  • Jianlong Ji
  • Mangmang Li
  • Zhaowei Chen
  • Hongwang Wang
  • Xiaoning Jiang
  • Kai Zhuo
  • Ying Liu
  • Xing Yang
  • Zhen Gu
  • Shengbo SangEmail author
  • Yang ShuEmail author
Research Article
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Abstract

Microfluid chips integrating with organic electrochemical transistors (OECTs) are useful for manufacturing biosensors with high throughput and large-scale analyses. We report here the utilization of alternating current (AC) electrodeposition to fabricate OECTs in situ on a microfluid chip. With this method, the organic semiconductor (OS) layer with a channel length of 8 ώm was readily prepared without requiring the post-bonding process in the conventional construction of microfluidic chips. Poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate)/graphene quantum dots (PEDOT:PSS/GQDs) composites with different morphologies, such as microfilms, nanodendrites and nanowires were electropolymerized. The mass transfer process of the electropolymerization reaction was evidenced to be diffusion limited. Morphologies, growth directions, and chemical structures of OS layers could be tuned by the amplitude and the frequency of the AC voltage. Transfer and output characteristic curves of OECTs were measured on the microfluidic chip. The maximum transconductance, on/off current ratio and threshold voltage measured in the experiment was 1.58 mS, 246, and 0.120 V, respectively.

Keywords

electrodeposition in situ microfluidic chip PEDOT:PSS/GQDs composite transistor 

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Notes

Acknowledgements

This work is supported by the National Natural Science Foundation of China (Nos. 51705354, 51622507, and 61671271); Scientific and Technologial Innovation Programs of Higher Education Institutions in Shanxi (Nos. 183290224-S and 201802029).

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In situ fabrication of organic electrochemical transistors on a microfluidic chip

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Copyright information

© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Jianlong Ji
    • 1
    • 2
  • Mangmang Li
    • 1
  • Zhaowei Chen
    • 3
  • Hongwang Wang
    • 1
  • Xiaoning Jiang
    • 2
  • Kai Zhuo
    • 1
  • Ying Liu
    • 1
  • Xing Yang
    • 4
  • Zhen Gu
    • 3
  • Shengbo Sang
    • 1
    Email author
  • Yang Shu
    • 5
    Email author
  1. 1.College of Information and ComputerTaiyuan University of TechnologyTaiyuanChina
  2. 2.Department of Mechanical and Aerospace EngineeringNorth Carolina State UniversityRaleighUSA
  3. 3.Department of Bioengineering, California Nanosystems InstituteUniversity of California, Los AngelesLos AngelesUSA
  4. 4.The State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision InstrumentTsinghua UniversityBeijingChina
  5. 5.Department of Chemistry, Colleges of SciencesNortheastern UniversityShenyangChina

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