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Fast dopamine detection based on evanescent wave detection platform.

Lipeng Pan1, Mingye Zou1, Fangxing Ma1

  • 1College of Materials, Xiamen University, 422 Siming South Road, Xiamen, 361005, China.

Analytica Chimica Acta
|January 16, 2022
PubMed
Summary
This summary is machine-generated.

A new evanescent wave detection platform (EWDP) offers sensitive detection of gold nanoclusters. This system enables rapid dopamine (DA) quantification using a tyrosinase-enhanced photoinduced electron transfer mechanism.

Keywords:
DopamineEvanescent waveFluorescence sensorOptical fiber

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Area of Science:

  • Analytical Chemistry
  • Nanotechnology
  • Biomedical Engineering

Background:

  • Evanescent wave detection platforms offer high sensitivity for analyzing fluorescent nanomaterials.
  • Gold nanoclusters are promising fluorescent probes for biosensing applications.
  • Dopamine (DA) detection is crucial for diagnosing neurological disorders.

Purpose of the Study:

  • To develop a compact evanescent wave detection platform (EWDP) for sensitive fluorescence detection.
  • To establish a rapid and efficient method for dopamine (DA) detection using the EWDP.
  • To investigate the application of tyrosinase (TYR) for enhanced DA detection.

Main Methods:

  • Fabrication of a compact EWDP utilizing a simple optical system and a Si-based photodetector.
  • Integration of a microfluidic sample cell for reduced analyte volume (approx. 30 μL).
  • Development of a dopamine detection strategy based on photoinduced electron transfer (PET) quenching mechanism, enhanced by tyrosinase (TYR).

Main Results:

  • The EWDP demonstrated improved optical efficiency and detection sensitivity.
  • A linear relationship was observed between the quenching ratio and DA concentration (0.03–60 μM).
  • A low detection limit of 0.03 μM was achieved for DA detection within 1 minute.

Conclusions:

  • The developed EWDP provides a sensitive and rapid method for detecting gold nanoclusters.
  • The tyrosinase-enhanced strategy allows for swift and accurate dopamine quantification.
  • This platform shows significant potential for fast dopamine detection in micro-samples.