Abstract

A new class of nano-antimicrobials was developed by Ion Beam co-Sputtering of ZnO and polytetrafluoro_ ethylene targets. The resulting nanostructured coatings combine the antimicrobial properties of ZnO nanoparticles with the water repellence and anti-stain characters of the dispersing fluoropolymer (CFx). ZnO-CFx nanocomposites were prepared varying ZnO volume fraction (φ) in the CFx matrix by tuning the sputter- ing deposition parameters. Morphological analysis confirmed the presence of homogenously distributed ZnO nanoclusters in the polymer. ZnO loadings ranging in the 0.05-0.15 interval were explored and the nano-composites were characterized by X-ray Photoelectron Spectroscopy (XPS) to investigate their surface chemical composition. XPS spectra evidenced a high degree of polymer defluorina-tion along with the formation of ZnF2 at increasing φ valu-es. Zn speciation was performed on Zn L3M45M45 Auger signal. Coatings bioactivity was assessed against Escheri-chia coli, Staphylococcus aureus, and Kluyveromyces marxianus. At φ ≥ 0.10, ZnO-CFx composites exhibited appreciable antibacterial activity, irrespective of the target organism.

Autore Pugliese

• Valentini Antonio , Bonerba Elisabetta , Tantillo Giuseppina , Sabbatini Luigia , Cioffi Nicola , Picca Rosaria Anna

Tutti gli autori

• VALENTINI A.;BONERBA E.;TANTILLO G.;SABBATINI L.;VALENTINI M.;NITTI M.A.;SPORTELLI M.C.;SPORTELLI M.C.;CIOFFI N.;PICCA R.A.

Titolo volume/Rivista

Non Disponibile

Anno di pubblicazione

2014

ISSN

1947-2935

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

Non Disponibile

Numero di citazioni Scopus

10

Ultimo Aggiornamento Citazioni

Non Disponibile

Settori ERC

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Codici ASJC

Non Disponibile