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Polymeric Microneedle Array Fabrication by Photolithography
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Size-tunable, highly sensitive microelectrode arrays enabled by polymer pen lithography.

Xinlei Ma1, Fengwang Li, Zhuang Xie

  • 1Research Center for Bioengineering and Sensing Technology, Beijing Key Laboratory for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, University of Science & Technology Beijing, 100083, Beijing, P. R. China. zhangxueji@ustb.edu.cn.

Soft Matter
|May 12, 2017
PubMed
Summary
This summary is machine-generated.

We developed a simple method to create microelectrode arrays (MEAs) using polymer pen lithography and in situ polymerization. These MEAs function as sensitive biosensors for hydrogen peroxide (H2O2) detection.

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Area of Science:

  • Materials Science
  • Analytical Chemistry
  • Biosensor Technology

Background:

  • Microelectrode arrays (MEAs) are crucial for electrochemical sensing.
  • Fabrication of MEAs with precise dimensions can be challenging.
  • In situ electrodeposition of sensing materials offers advantages for biosensor development.

Purpose of the Study:

  • To present a straightforward, bottom-up approach for fabricating microelectrode arrays (MEAs).
  • To demonstrate the use of polymer pen lithography (PPL) and in situ polymerization for MEA fabrication.
  • To evaluate the performance of the fabricated MEAs as biosensors for hydrogen peroxide (H2O2).

Main Methods:

  • Utilized polymer pen lithography (PPL) for patterning.
  • Employed in situ polymerization for MEA fabrication.
  • Electrodeposited Prussian blue onto the MEAs for H2O2 sensing.

Main Results:

  • Successfully fabricated MEAs with well-controlled dimensions using PPL and in situ polymerization.
  • Demonstrated in situ electrodeposition of Prussian blue on the fabricated MEAs.
  • Achieved a low detection limit of 5 nM for H2O2.
  • Obtained a high sensitivity of 0.7 A cm⁻² M⁻¹ for H2O2 detection.

Conclusions:

  • The combined PPL and in situ polymerization approach provides a bench-top fabrication method for high-quality MEAs.
  • The fabricated MEAs are effective for in situ Prussian blue electrodeposition.
  • The developed MEAs function as sensitive and reliable biosensors for hydrogen peroxide.