The colonization of microorganisms and their subsequent interaction with stone substrates under different environmental conditions encourage deterioration of materials by multiple mechanisms resulting in changes in the original color, appearance and durability. One of the emerging alternatives to remedy biodeterioration is nanotechnology, thanks to nanoparticle properties such as small size, no-toxicity, high photo-reactivity, and low impact on the environment. This study highlighted the effects of ZnO-based nanomaterials of two bacteria genera isolated from the Temple of Concordia (Agrigento’s Valley of the Temples in Sicily, Italy) that are involved in biodeterioration processes. The antimicrobial activities of ZnO-nanorods (Zn-NRs) and graphene nanoplatelets decorated with Zn-NRs (ZNGs) were evaluated against the Gram positive Arthrobacter aurescens and two isolates of the Gram negative Achromobacter spanius. ZNGs demonstrated high antibacterial and antibiofilm activities on several substrates such as stones with different porosity. In the case of ZNGs, a marked time- and dose-dependent bactericidal effect was highlighted against all bacterial species. Therefore, these nanomaterials represent a promising tool for developing biocompatible materials that can be exploited for the conservation of cultural heritage. These nanostructures can be successfully applied without releasing toxic compounds, thus spreading their usability.

Antibacterial effect of zinc oxide-based nanomaterials on environmental biodeteriogens affecting historical buildings / Schifano, Emily; Cavallini, Domenico; DE BELLIS, Giovanni; Bracciale, MARIA PAOLA; Felici, Anna Candida; Santarelli, Maria Laura; Sarto, Maria Sabrina; Uccelletti, Daniela. - In: NANOMATERIALS. - ISSN 2079-4991. - 10:2(2020), pp. 1-14. [10.3390/nano10020335]

Antibacterial effect of zinc oxide-based nanomaterials on environmental biodeteriogens affecting historical buildings

Emily Schifano;Domenico Cavallini;Giovanni De Bellis;Maria Paola Bracciale;Anna Candida Felici;Maria Laura Santarelli;Maria Sabrina Sarto;Daniela Uccelletti
2020

Abstract

The colonization of microorganisms and their subsequent interaction with stone substrates under different environmental conditions encourage deterioration of materials by multiple mechanisms resulting in changes in the original color, appearance and durability. One of the emerging alternatives to remedy biodeterioration is nanotechnology, thanks to nanoparticle properties such as small size, no-toxicity, high photo-reactivity, and low impact on the environment. This study highlighted the effects of ZnO-based nanomaterials of two bacteria genera isolated from the Temple of Concordia (Agrigento’s Valley of the Temples in Sicily, Italy) that are involved in biodeterioration processes. The antimicrobial activities of ZnO-nanorods (Zn-NRs) and graphene nanoplatelets decorated with Zn-NRs (ZNGs) were evaluated against the Gram positive Arthrobacter aurescens and two isolates of the Gram negative Achromobacter spanius. ZNGs demonstrated high antibacterial and antibiofilm activities on several substrates such as stones with different porosity. In the case of ZNGs, a marked time- and dose-dependent bactericidal effect was highlighted against all bacterial species. Therefore, these nanomaterials represent a promising tool for developing biocompatible materials that can be exploited for the conservation of cultural heritage. These nanostructures can be successfully applied without releasing toxic compounds, thus spreading their usability.
stones; biodegradation; antimicrobial; cultural heritage; ZNGs
01 Pubblicazione su rivista::01a Articolo in rivista
Antibacterial effect of zinc oxide-based nanomaterials on environmental biodeteriogens affecting historical buildings / Schifano, Emily; Cavallini, Domenico; DE BELLIS, Giovanni; Bracciale, MARIA PAOLA; Felici, Anna Candida; Santarelli, Maria Laura; Sarto, Maria Sabrina; Uccelletti, Daniela. - In: NANOMATERIALS. - ISSN 2079-4991. - 10:2(2020), pp. 1-14. [10.3390/nano10020335]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1362762
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