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Bipolar Electrode Based Multicolor Electrochemiluminescence Biosensor.

Yin-Zhu Wang1, Cong-Hui Xu1, Wei Zhao1

  • 1State Key Laboratory of Analytical Chemistry for Life Science and Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210023, China.

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|June 30, 2017
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Summary
This summary is machine-generated.

This study introduces a novel multicolor electrochemiluminescence (ECL) device using a closed bipolar electrode (BPE) for visualizing prostate-specific antigen (PSA) in blood serum. The device enables naked-eye detection of PSA levels by observing color changes in the ECL emission.

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Area of Science:

  • Electrochemistry
  • Biosensing
  • Analytical Chemistry

Background:

  • Prostate-specific antigen (PSA) is a key biomarker for prostate cancer detection.
  • Existing electrochemiluminescence (ECL) methods often require complex instrumentation.
  • Visualizing biomarker concentrations with simple devices remains a challenge.

Purpose of the Study:

  • To develop a multicolor ECL device for visualized sensing of PSA.
  • To utilize a closed bipolar electrode (BPE) for selective ECL excitation.
  • To enable naked-eye detection of PSA levels in human blood serum.

Main Methods:

  • Fabrication of a closed bipolar electrode (BPE) device.
  • Utilizing a mixture of [Ru(bpy)3]2+ and [Ir(ppy)3] as electrochemiluminophores.
  • Modulating BPE resistance to control interfacial potential and achieve multicolor ECL emission.
  • Constructing a PSA concentration-dependent silver bridge for conductivity modulation.

Main Results:

  • Demonstrated multicolor ECL emission (green-yellow-red) by tuning BPE interfacial potential.
  • Successfully quantified PSA concentrations in human blood serum.
  • Achieved naked-eye recognition of PSA cutoff values (4.0 and 10.0 ng/mL) via color variation.
  • Established a novel BPE-ECL system for potential-resolved multicolor emission.

Conclusions:

  • The developed multicolor BPE-ECL device offers a promising platform for visualized biomarker sensing.
  • This approach simplifies ECL analysis and enables visual detection without specialized equipment.
  • The BPE-based multicolor ECL system represents a significant advancement in biological analysis and diagnostics.