Abstract

VALLEJO, William et al. Antimicrobial activity of silver-modified titanium dioxide thin films. Rev. acad. colomb. cienc. exact. fis. nat. [online]. 2016, vol.40, n.154, pp.69-74. ISSN 0370-3908.  https://doi.org/10.18257/raccefyn.289.

We studied titanium dioxide (TiO₂) thin films and silver-modified titanium dioxide thin films antimicrobial activity. The TiO₂ thin films were synthesized using Doctor Blade method. The synthesis of silver-modified films was done by chemical photoreduction under UV irradiation. Materials were characterized by Raman spectroscopy and scanning electron microscopy (SEM) measurements. We determined the antimicrobial effect against Staphylococcus aureus of the incorporation of silver particles on TiO₂. Results indicated silver particles agglomerated on the surface of TiO₂ generating aggregates of around 200 nm. Raman spectroscopy suggested that silver aggregates may present the plasmon resonance superficial phenomenon. The antimicrobial activity assay indicated that the TiO₂ films modification with silver increased by 2.18 times the efficiency of the process.

Keywords : Titanium dioxide; photocatalysis; antimicrobial activity.

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