Fluorescence of dyes adsorbed on highly organized, nanostructured gold surfaces.

Research paper by Stefano A SA Levi, Ahmed A Mourran, Joachim P JP Spatz, Frank C J M FC van Veggel, David N DN Reinhoudt, Martin M Möller

Indexed on: 31 Aug '02Published on: 31 Aug '02Published in: Chemistry - A European Journal


It is shown that fluorescent dyes can be adsorbed selectively on gold nanoparticles which are immobilized on a glass substrate and that the fluorescence originating from the adsorbed dyes exhibits significantly less quenching when compared to dyes adsorbed on bulk gold. Self-assembled monolayers of lissamine sulfide molecules have been studied both on bulk gold and on glass surfaces bearing gold nanoparticles. Gold nanoparticles have been arranged in ordered, two-dimensional patterns, with periodicity in the microm range and used as substrate for the fluorescent dyes. Optical resolution of the fluorescence originating from the pattern has been achieved with laser-scanning confocal microscopy.