An antibacterial surface coating composed of PAH/SiO₂ nanostructurated films by layer by layer

In this work we propose a novel antibacterial coating composed of SiO₂ and the polymer Poly(allylamine hydrochloride) (PAH). The coating was fabricated by the technique Layer-by-Layer (LbL). This technique has already been used in previous works, and it has the advantage that it allows to control the construction of nanosized and well organized multilayer films. Here, the new nanotexturized LbL SiO₂ surface acts as antibacterial agent. The fabricated coatings have been tested in bacterial cultures of genus Lactobacillus to observe their antibacterial properties. It has been demonstrated these PAH/SiO₂ coating films have a very good antimicrobial behaviour against this type of bacteria.