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Naked-Eye Biosensing using Plasmonic Nanoparticles

Since the introduction of LSPR as a transduction technique, monitoring the antibody/antigen is only possible by UV-Visible spectroscopy. Indeed, the color changes resulting from a displacement of the LSPR band during target recognition are, for spherical gold nanoparticles that often absorb around 520 nm, a few nanometers and are therefore not visible to the naked eye. Indeed, in this region of the electromagnetic spectrum, red extends over several tens of nm. A plasmon band located slightly lower in the electromagnetic spectrum would generate a much more noticeable colour change for an equivalent displacement. The combination of gold and silver in the form of an alloy or core-shell allows the position of the LSPR band to be modulated and located in the area of interest.

08/11/19

Traductions :
      • Vincent Pellas - Thesis Defense

        Congratulations to Vincent for his PhD defense and his work on the "Synthesis and characterization silica coated gold nanorods Au@SiO2 for biomedical applications ", performed under the supervision of Souhir Boujday & Michèle Salmain.

      • David Hu - Thesis defense

        Congratulations to David for his PhD defense and for his incredible work on Nanocomposites Photocatalysts UCNP@SiO2@ZnO, active under NIR light for wastewater treatment", performed under the supervision of Juliette Blanchard and Souhir Boujday. 

      • Valentin's arrival

        Warm welcome to Valentin for his 3 months Master 1 internship on the "Adsorption of thiolate molecules on gold surfaces" under the supervision of Souhir Boujday and Yacine Mazouzi.