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Highly Sensitive Multi-Channel Biosensor for Low-Interference Simultaneous Detection.

Jiapeng Su1, Gongli Xiao1, Hongyan Yang2

  • 1Guangxi Key Laboratory of Precision Navigation Technology and Application, Guilin University of Electronic Technology, Guilin 541004, China.

Nanomaterials (Basel, Switzerland)
|January 21, 2023
PubMed
Summary
This summary is machine-generated.

This study introduces a novel multi-channel photonic crystal fiber sensor for simultaneous detection. The advanced design offers high sensitivity and low interference for refractive index and bio-detection applications.

Keywords:
fiber optic sensormulti-channel simultaneous detectionsurface plasmon resonance

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Area of Science:

  • Photonics
  • Optical Sensors
  • Biomedical Engineering

Background:

  • Surface Plasmon Resonance (SPR) sensors are crucial for detecting minute changes in refractive index.
  • Existing multi-channel sensors often suffer from mutual interference, limiting simultaneous detection capabilities.
  • Photonic Crystal Fibers (PCFs) offer unique light-confining properties for advanced sensor development.

Purpose of the Study:

  • To propose and investigate a novel multi-channel photonic crystal fiber sensor.
  • To achieve simultaneous detection of multiple analytes with reduced channel interference.
  • To enhance Surface Plasmon Resonance (SPR) for improved sensing performance.

Main Methods:

  • A dual-polarization multi-channel PCF sensor design incorporating diverse metal and plasmonic materials.
  • Numerical simulation using the full vector finite element method (FEM) for performance analysis.
  • Optimization of structural parameters to maximize wavelength sensitivity.

Main Results:

  • The sensor features four channels, each with distinct metal (gold/silver) and plasmonic (TiO2, Tl2O5, graphene) coatings.
  • Maximum wavelength sensitivities achieved were 49,800 nm/RIU (channel-1), 49,000 nm/RIU (channel-2), 35,900 nm/RIU (channel-3), and 36,800 nm/RIU (channel-4).
  • Simulated bio-detection sensitivities of 11,500 nm/RIU for red blood cells and 12,200 nm/RIU for MCF-7 cancer cells were demonstrated.

Conclusions:

  • The proposed multi-channel PCF sensor exhibits a novel design with simultaneous multi-channel detection capabilities.
  • The sensor demonstrates strong anti-interference properties and high sensitivity for refractive index measurements.
  • The theoretical analysis confirms the sensor's potential for effective bio-detection applications.