Plasma-Mediated Modification of Austenitic Stainless Steel: Application to the Prevention of Yeast Adhesion

Claire Saulou-Berion (1, 2, 3) , Bernard Despax (2) , Patrice Raynaud (4) , Sandrine Zanna (5) , Philippe Marcus (5) , Muriel Mercier-Bonin (3, 1)

1 LISBP - Laboratoire d'Ingénierie des Systèmes Biologiques et des Procédés
2 LAPLACE - LAboratoire PLasma et Conversion d'Energie
3 UT - Université de Toulouse
4 LAPLACE-MPP - Matériaux et Procédés Plasmas
5 LPCS - Laboratoire de Physico-Chimie des Surfaces

The work is focused on defining a stainless steel surface treatment to prevent microbial adhesion. The yeast Saccharomyces cerevisiae was selected as the model for eukaryotic cells. Different surface cleaning procedures, including chemical and plasma-mediated treatments, were studied. Detachment experiments displayed no modification in yeast adhesion, despite significant variations in the physico-chemical properties of the solid surface. Plasma-mediated thin coatings (~375 nm) were then deposited on stainless steel applying hexamethyldisiloxane/oxygen plasma. FT-IR study revealed a dense Si-O-Si network, while XPS analysis detected no more iron or chromiumat the extreme surface. Detachment experiments demonstrated that these films were successful in preventing cell adhesion, due to a barrier effect.

Mots clés: anti-adhesive coatings; cold plasma; modification; stainless steel; surface; yeast adhesion

Domaines: Plasmas; Matériaux; Biomatériaux; Microbiologie et Parasitologie

Claire Saulou-Berion, Bernard Despax, Patrice Raynaud, Sandrine Zanna, Philippe Marcus, et al.. Plasma-Mediated Modification of Austenitic Stainless Steel: Application to the Prevention of Yeast Adhesion. Plasma Processes and Polymers, 2009, 6 (12), pp.813-824. ⟨10.1002/ppap.200900069⟩. ⟨hal-01563848⟩