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Synthesis of Immunotargeted Magneto-plasmonic Nanoclusters
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Core-Shell Magnetic Nanoparticles for Highly Sensitive Magnetoelastic Immunosensor

Raffaele Campanile1,2, Emanuela Scardapane1,2, Antonio Forente1

  • 1Department of Physics "E. Pancini", University of Naples Federico II, Via Cintia 26, I-80126 Napoli, Italy.

Nanomaterials (Basel, Switzerland)
|August 8, 2020
PubMed

Insights

This study introduces a novel magnetoelastic biosensor for wireless detection of human IgG in liquids. The enhanced biosensor achieves a low limit of detection (LOD) below 1 nM, demonstrating its potential for rapid diagnostics.

Area of Science:

  • Biomedical Engineering
  • Nanotechnology
  • Biosensing

Background:

  • Magnetoelastic (ME) biosensors offer potential for wireless analyte detection.
  • Existing biosensors often face limitations in sensitivity and detection speed for real-world applications.

Purpose of the Study:

  • To develop and characterize a novel ME biosensor for sensitive and rapid wireless detection of human IgG.
  • To enhance biosensor sensitivity using a new amplification protocol with gold-coated magnetic nanoparticles.

Main Methods:

  • Immobilization of anti-human IgG antibodies onto the ME sensor surface using photochemical immobilization technique (PIT).
  • Development of a sandwich assay utilizing gold nanoflower-coated magnetic nanoparticles for signal amplification.
  • Testing the ME biosensor's performance with human IgG in liquid samples.

Main Results:

  • The developed ME biosensor demonstrated a limit of detection (LOD) below 1 nM for human IgG.
  • The biosensor exhibited rapid response times within minutes and functionality in water.
  • The amplification protocol significantly enhanced the sensor's sensitivity.

Conclusions:

  • The novel ME biosensor with magnetic nanoparticle amplification shows high sensitivity and rapid response for analyte detection.
  • This technology is highly promising for real-time wireless detection of pathogens and diagnostic purposes.

Keywords:
core-shell magnetic nanoparticleshuman IgGmagnetoelastic biosensorphotochemical immobilization technique

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