Characterization of the diffusion of fluorophores within microbial biofilms by fluorescence correlation microscopy under two-photon excitation

摘要

The penetration and diffusion capabilities of fluorophores inside microbial biofilms of heterogeneous three-dimensional structure were studied by fluorescence correlation microscopy under two-photon excitation. The influence of the size and the surface charge of the fluorophores were investigated in order to understand the mechanisms involved in molecular diffusion inhibition occuring in biofilms such as electrostatic and steric interactions.