Author(s)

Zoe Vineth Quiñones-Jurado^1*, Miguel Ángel Waldo-Mendoza², Hugo Marcelo Aguilera-Bandin¹, Edgar Giovanny Villabona-Leal³, Elsa Cervantes-González⁴, Elías Pérez³

¹Innovation and Development in Advanced Materials, POLYnnova Group, San Luis Potosí, México.
²A Schulman of México, San Luis Potosí, México.
³Institute of Physic, Autonomous University of San Luis Potosí, San Luis Potosí, México.
⁴Academic Coordination, Altiplano Region, Autonomous University of San Luis Potosí, San Luis Potosí, México.

Ag/TiO₂ nanocomposites are usually regarded as an effective synergy for high antimicrobial performance under ultraviolet-visible light conditions. This study confirmed that the surface plasmon resonance of Ag NPs plays an important role in relation to the NPs size and consequently with the antibacterial effect of the nanocomposite. We observed that under visible light the reactivity of TiO₂ cannot be amplified when it is supporting Ag NPs that have an inactive photocatalytically surface. The results confirmed that the antimicrobial effectiveness of nanocomposite based on Ag NPs supported-TiO₂ is closely associated to the contact surface area and to the electronic performance of the noble metal.

Ag-TiO₂, Antibacterial, Silver Nanoparticles, Surface Confinement

Quiñones-Jurado, Z. , Waldo-Mendoza, M. , Aguilera-Bandin, H. , Villabona-Leal, E. , Cervantes-González, E. and Pérez, E. (2014) Silver Nanoparticles Supported on TiO₂ and Their Antibacterial Properties: Effect of Surface Confinement and Nonexistence of Plasmon Resonance. Materials Sciences and Applications, 5, 895-903. doi: 10.4236/msa.2014.512091.