Sensitivity Enhancement of Lossy Mode Resonance Immunosenors Using Gold-Nanoparticles for Detecting Low Concentrations of Biomarkers

Strategic Insights -

Researchers at Public University Navarra have developed a biosensor that uses gold nanoparticles to enhance sensitivity, enabling the detection of vascular endothelial growth factor (VEGF) protein at concentrations as low as 0.1 ng/mL. This breakthrough has significant implications for biosensing applications, particularly in the detection of low concentrations of biomarkers with high specificity and sensitivity. The sensor, which combines gold nanoparticles with a lossy mode resonance (LMR) platform, has been shown to outperform traditional label-free LMR-based sensors in terms of sensitivity. This research has been peer-reviewed and published in the journal Talanta.

Key Takeaways:

  • Researchers at Public University Navarra have developed a biosensor that uses gold nanoparticles to enhance sensitivity for detecting VEGF protein.
  • The sensor combines gold nanoparticles with a lossy mode resonance (LMR) platform, enabling the detection of low concentrations of biomarkers with high specificity and sensitivity.
  • The sensor was assessed using three detection approaches: label-free, sandwich assay, and AuNP-labeled sandwich assay, with the AuNP-labeled sandwich assay showing the highest sensitivity.
  • The integration of AuNP significantly improved sensitivity, enabling detection at concentrations as low as 0.1 ng/mL.
  • The sensor outperformed traditional label-free LMR-based sensors in terms of sensitivity.
  • The research concludes that AuNP-enhanced LMR sensors have potential for detecting low concentrations of biomarkers with high specificity and sensitivity.
  • The authors include Ignacio R. Matias, Pablo Zubiate, Sukayna Ezquerro, Enrique Azuaje-Hualde, Raquel Catalan-Carrio, F. Nicolas Nazar, Abian B. Socorro-Leranoz, Concepcion Alonso, Fernando Benito-Lopez, and Lourdes Basabe-Desmonts.
  • The publisher of the journal Talanta is Elsevier, located at Radarweg 29, 1043 NX Amsterdam, Netherlands.

Statistics:

  • The sensor has been shown to detect VEGF protein at concentrations as low as 0.1 ng/mL.
  • The AuNP-labeled sandwich assay showed the highest sensitivity among the three detection approaches.
  • The sensor outperformed traditional label-free LMR-based sensors in terms of sensitivity.

Sources:

  • VerticalNews, "New Research on Nanotechnology - Gold Nanoparticles" (16 June 2025)
  • Sensitivity enhancement of a lossy mode resonance immunosensor using gold-nanoparticles for the detection of vascular endothelial growth factor protein. Talanta, 2025;296:128415.
  • Public University Navarra, "Public University Navarra Reports Findings in Gold Nanoparticles" (16 June 2025)
  • NewsRx, "Public University Navarra Reports Findings in Gold Nanoparticles" (16 June 2025)