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Polydopamine films have been introduced by Messersmith et al. as a possible "versatile" surface functionalization method allowing to coat the surface of almost all known materials even superhydrophobic surfaces. These new kinds of coatings also confer a plethora of functionalities to the coated materials owing to the complex chemistry of the catechol quinone moieties present on the surface of polydopamine. These coatings may hence become an interesting alternative to established surface coatings like selfassembled monolayers and polyelectrolyte multilayered films. In this review, we describe the knowledge acquired in the last 3 years about the deposition mechanisms of polydopamine films, their properties, and various applications in surface science at the nanoscale.

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Organosilicon layers were deposited on galvanized steel to give a protective coating against corrosion. HMDSO was atomized and injected into a DBD plasma at atmospheric pressure. Plasma‐polymerized HMDSO layers were different when HMDSO nanodroplets reacted directly in the plasma area or when such droplets reacted with the plasma once deposited on the surface. Addition of a plasma curing step was also studied. Influence of the deposition method on the properties of ppHMDSO layers was also studied. Layer structure was measured by SEM and interferometry, and its chemical structure was analyzed by FTIR and XPS. Corrosion resistance, which was measured by electrochemistry, was significantly increased when a plasma curing step was performed.

Plasma polymerized (pp) layers are promising owing to their ease of deposition. Moreover, incorporation of suitable nanoparticles into a polymer matrix can provide improved properties, for instance an increased corrosion resistance, to the final nanocomposite layer. The efficiency of such an incorporation is highly dependent of the layer structure in general, and more particularly of nanoparticles dispersion in the coating. The synthesis of a hybrid coating for anticorrosion purpose is described. Deposition of a plasma polymerized hexamethyldisiloxane (ppHMDSO) coating matrix with aluminum–cerium oxide nanoparticles incorporation is performed by means of an atmospheric pressure plasma reactor in a dielectric barrier discharge (DBD) configuration. Admixture of ethanol within hexamethyldisiloxane (HMDSO) is carried out in order to improve homogeneity and properties of the coating.