Silicones are widely used in the medical field but are, however, prone to bacterial contamination due to their hydrophobic nature. In this thesis, three methods were used to develop new antibacterial PDMS surfaces. In the first one, an electric field was applied between two PDMS-coated metallic electrodes. A cathodic repulsive effect specific to staphylococci was obtained. In the second, a bactericidal PDMS surface carrying a claramine derivative was prepared by the Huisgen click addition. In the third, bactericidal cationic surfaces were prepared by photo-grafting of cationic polymers onto PDMS surfaces via 'grafting to' and 'grafting from' processes. The surfaces developed in this thesis could be used in devices that are not in contact wi...