Antimicrobial layers

Description: Silver nanocluster - silica matrix composite coatings were deposited by radio frequency (RF) co-sputtering on several substrates (glass, steel, polymers, textiles…) for different applications (medical devices, mobile telephones, food industry, personnel protective systems and space structures) to impart antimicrobial properties. By varying the sputtering parameters, it is possible to obtain different coating thickness and so to tailor silver content and release, in order to meet antibacterial, aesthetic and functional requirements. The obtained coatings are resistant from chemical, thermal and mechanical point of view and they do not release metallic nanoparticles. The antimicrobial activity of these coatings was detected up to 450 °C toward several Gram+ and Gram- strains and fungi. Moreover, the antibacterial activity is maintained after gamma and EtO sterilization.

monica.ferraris@polito.it

Recent reference(s)

M. Ferraris et al., 2008 TO2008A000098.

M. Ferraris et al., 2010 Mater. Chem. Phys. 120 pp 123-126

M. Ferraris et al., 2010 Adv. Eng. Mater. 12 pp B276-B282

M. Ferraris et al., J. Nanopart.Res. 14 (2012) 1287–1305.

C. Balagna et al., Mater. Chem. Phys 135 (2012) 714–722

S. Ferraris et al., Appl. Surf. Sci. 317 (2014)131–139.

M. Miola et al., Appl.Surf. Sci. 313 (2014) 107–115

G. Muzio et al., Surface and Coatings Technology 319 (2017) 326-334

M. Ferraris et al., Applied Surface Science 396 (2017) 1546–1555

Funding

Regional project (CT 2007) 2009-2012: NABLA – Nanostructured AntiBacterial Layers

European project (FP7-SME-2010) 2010-2012: NASLA - Nanostructured Anti-SepticaL coAtings

Regional project MARTe - Materiali Antibatterici per Rivestimento di Tessuti 2014-2016

Politecnico di Torino funded “Proof of Concept” 2018

Keywords

Antibacterial, sputtering, coating, silver nanoparticles