Annales de Physique

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Ann. Phys. Fr., Vol. 32, N°2-3 2007, pp. 143-145
DOI: 10.1051/anphys:2008028

Dye-substrate interactions evidenced by fluorescence correlation spectroscopy

C. Boutin, J. Plain, R. Jaffiol, R. Deturche and P. Royer

Laboratoire de Nanotechnologie et d'Instrumentation Optique, Institut Charles Delaunay CNRS FRE 2848, Université de Technologie de Troyes, 12 rue Marie Curie, B.P. 2060, 10010 Troyes Cedex, France

Published online: 23 May 2008

Abstract
In this report, we discuss how the nature of the substrate-water interaction may modify the free diffusion of single molecules, then influencing fluorescence correlation spectroscopy measurements. Our results show a strong influence, up to a few micrometers from the interface, of the surface polarity. This effect is assessed through the relative weight of the two dimension diffusion process observed close to the surface.