Our news journalists obtained a quote from the research, "Photoluminescence is brought about by the incorporation of a silylated ruthenium(II) complex. The surface properties of the silica particles were designed by reaction with amino-organosilanes, quaternary ammonium-organosilanes, carboxylate-organosilanes and hexamethyldisilazane. BSNPs were characterized extensively by DRIFT, (13)C and (29)Si solid state NMR, XPS, and photoluminescence. Zeta potential and contact angle measurements exhibited various surface properties (hydrophilic/hydrophobic balance and electric charge) according to the functional groups. Confocal laser scanning microscopy (CLSM) measurements showed that the spatial distribution of these nanoparticles inside a biofilm of Pseudomonas aeruginosa PAO1 depends more on their hydrophilic/hydrophobic characteristics than on their size."
According to the news editors, the research concluded: "CLSM observations using two nanosized particles (25 and 68 nm) suggest that narrow diffusion paths exist through the extracellular polymeric substances matrix."
For more information on this research see: Bifunctional silica nanoparticles for the exploration of biofilms of Pseudomonas aeruginosa. Biofouling, 2013;29(7):775-88 (see also Proteobacteria).
The news correspondents report that additional information may be obtained from L. Mauline, Centre Interuniversitaire de Recherche et de l'Ingenierie des Materiaux, UMR-CNRS 5085, Universite Paul Sabatier,
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