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Updated: Jan 12, 2026

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New Micron-Ring-Disk Electrodes: Fabrication, Characterization, and Applications.

Tingsen Zhang1, Jing Zhan1, Lin Chen1

  • 1School of Advanced Materials and Nanotechnology, Xidian University, Xi'an 710126, People's Republic of China.

Analytical Chemistry
|November 7, 2025
PubMed
Summary

Researchers developed micro-ring-disk electrodes (MRDEs) for simultaneous multi-analyte detection. This compact system enables selective detection of dopamine (DA) even with interfering substances like ascorbic acid (AA).

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Area of Science:

  • Electrochemistry
  • Analytical Chemistry
  • Materials Science

Background:

  • Single-working-electrode systems are limited for simultaneous multi-analyte detection.
  • Existing two-working-electrode systems (e.g., rotating ring-disk electrode) have drawbacks like low efficiency and bulkiness.

Purpose of the Study:

  • To design and fabricate a simple, low-cost, compact, and user-friendly two-working-electrode system.
  • To enable in situ detection of multiple targets with high selectivity.

Main Methods:

  • Fabrication of micro-ring-disk electrodes (MRDEs) with tunable disk and ring sizes (5–19 μm).
  • Utilizing the dual-electrode structure for selective electrochemical detection.
  • Demonstrating selective detection of dopamine (DA) in the presence of ascorbic acid (AA).

Main Results:

  • High-performance MRDEs were reliably fabricated using various materials.
  • The MRDE system enabled selective detection of DA, even with a fourfold excess of AA.
  • Accurate DA detection was achieved by oxidizing AA at the microring electrode.

Conclusions:

  • The developed MRDEs offer a practical solution for fabricating advanced two-working-electrode systems.
  • MRDEs provide valuable insights for selective and multi-target detection in complex sample matrices.
  • This technology enhances electrochemical analysis capabilities for simultaneous analyte detection.