<img src="https://naked-science.ru/wp-content/uploads/2025/03/2025-03-04-phyche-fluor.jpg" alt="Scientists have learned how to control the fluorescence of a biomarker dye using a gold nanoparticle"/>Researchers from the Laboratory of Surface Phenomena in Polymer Systems at the Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences, together with colleagues from the Institute of Biochemical Physics of the Russian Academy of Sciences and the National Research Nuclear University MEPhI, have shown that the fluorophore sulfocyanine-3, grafted onto a spherical plasmonic nanoparticle with a gold core and an organosilica shell 14 nanometers thick, glows up to eight times brighter than a pure fluorophore due to plasmonic enhancement of fluorescence. If the shell is relatively thin (four nanometers), on the contrary, quenching occurs, and the fluorophore glows weaker. Changing the thickness of the shell around the gold core allows controlling the emission of the fluorophore. The obtained data are of great importance for the creation of materials with controlled fluorescence, for example, for biomarkers or optical nanodevices.
