Zhang and Chen (2009) showed that doping TiO2 with a metallic form of nanosilver, enhanced its bactericidal activity due to the unique structural feature of nanosilver dispersed on TiO2 surface. This indicated that TiO2 serves as a solid antiaggregation support to maintain the dispersion of nanosilver, which could also contribute to its antibacterial performance.
Kubacka et al. (2009) maintained that ethylene-vinyl alcohol copolymer (EVOH) nanocomposite containing mixed Ag-TiO2 has a good antimicrobial activity against yeast and moulds and bacteria through a plasmonic effect.
This interaction not only optimizes UVvisible photon handling by the film but also makes the whole surface of the nanomaterial biocidal while also eliminating the necessity for the contact between the primary biocidal inorganic agent and the microorganism.
An, Zhang, Wang, and Tang (2008) found silver optimal concentration 0.06 mg L−1 for preservation of asparagus by silver nanoparticles-polyvinylpyrrolidone (PVP) coating.
Damm, Münstedt, and Rösch (2008) reported that polyamide 6 filled with 2% (w/w) nanosilver was effective against E. coli even after being immersed in water for 100 days.
Fernández et al. (2009) reported that absorbent pads containing nanosilver were the common component in packaging to preserve poultry meat until consumption and that they could yield a log reduction of up to 40% in aerobic mesophilic bacteria.