Bacterial growth on a superhydrophobic surface containing silver nanoparticles

Saara Heinonen (Corresponding Author), J-P Nikkanen, J. Laakso, Mari Raulio, Outi Priha, E. Levänen

Research output: Contribution to journalArticle in a proceedings journalScientificpeer-review

12 Citations (Scopus)

Abstract

The antibacterial effect of silver can be exploited in the food and beverage industry and medicinal applications to reduce biofouling of surfaces. Very small amount of silver ions are enough to destructively affect the metabolism of bacteria. Moreover, superhydrophobic properties could reduce bacterial adhesion to the surface. In this study we fabricated superhydrophobic surfaces that contained nanosized silver particles. The superhydrophobic surfaces were manufactured onto stainless steel as combination of ceramic nanotopography and hydrophobication by fluorosilane. Silver nanoparticles were precipitated onto the surface by a chemical method. The dissolution of silver from the surface was tested in an aqueous environment under pH values of 1, 3, 5, 7, 9, 11 and 13. The pH value was adjusted with nitric acid and ammonia. It was found that dissolution rate of silver increased as the pH of the solution altered from the pH of de-ionized water to lower and higher pH values but dissolution occurred also in de-ionized water. The antimicrobial potential of this coating was investigated using bacterial strains isolated from the brewery equipment surfaces. The results showed that the number of bacteria adhering onto steel surface was significantly reduced (88%) on the superhydrophobic silver containing coating
Original languageEnglish
JournalIOP Conference Series: Materials Science and Engineering
Volume47
DOIs
Publication statusPublished - 2013
MoE publication typeA4 Article in a conference publication
Event2nd International Conference on Competitive Materials and Technological Processes, IC-CMTP 2012 - Miskolc-Lillafüred, Hungary
Duration: 8 Oct 201212 Oct 2012
Conference number: 2

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