Inhibition of biofilm formation on polystyrene substrates by atmospheric pressure plasma polymerization of siloxane‐based coatings

Abstract

Biofilms pose important economic and health risks in biomedical applications and in food industries. In this study, coatings that reduce the biofilm formation of Pseudomonas aeruginosa on polystyrene cell culture plates are deposited by plasma polymerization of (3‐aminopropyl)triethoxysilane using an atmospheric pressure plasma jet system at three different power levels. Surface characterizations and quantification of biofilm formation during 1 week after deposition suggest that the higher concentration of oxygenated carbon groups on the coated samples than on uncoated ones can induce higher levels of oxidative stress in the bacteria in contact with the coatings. This causes an initial overproduction of extracellular polymeric substances that can avoid further bacterial attachment and biofilm formation at later cycles of biofilm development.

Low‐friction coatings on medical needles through atmospheric‐pressure plasma‐polymerization technology

“…[49,50] As the plasma power increased, the chain-scission of the monomer and the formation of CO and CO 2 gases became higher, causing an increase in the amounts of oxygen and nitrogen, and a decrease in the carbon content. [51] On the other hand, the silicon proportion remained constant (5%). As the results from the deconvolutions revealed (Table 4), the inorganic nature of the needles increased gradually with the plasma power due to an increase of SiO 4 from 0.4% to 1.1% (Figure 10a).…”