Currently there is a strong demand for novel protective materials with effcient antibacterial properties. Nanocomposite materials loaded with photo-thermally active nanoparticles can offer promising opportunities due to the local increase of temperature upon near-infrared (NIR) light exposure capable of eradicating bacteria. In this work, we fabricated antibacterial films obtained by spraying on glass slides aqueous solutions of polymers, containing highly photo-thermally active gold nanostars (GNS) or Prussian Blue (PB) nanoparticles. Under NIR light irradiation with low intensities (0.35W/cm2) these films demonstrated a pronounced photo-thermal effect: ∆Tmax up to 26.4 ffC for the GNS-containing films and ∆Tmax up to 45.8 ffC for the PB-containing films. In the latter case, such a local temperature increase demonstrated a remarkable effect on a Gram-negative strain (P. aeruginosa) killing (84% of dead bacteria), and a promising effect on a Gram-positive strain (S. aureus) eradication (69% of dead bacteria). The fabricated films are promising prototypes for further development of lightweight surfaces with effcient antibacterial action that can be remotely activated on demand.
Nanocomposite sprayed films with photo-thermal properties for remote bacteria eradication / M. Borzenkov, G. Chirico, P. Pallavicini, P. Sperandeo, A. Polissi, G. Dacarro, L. Doveri, M. Collini, L. Sironi, M. Bouzin, L. D'Alfonso. - In: NANOMATERIALS. - ISSN 2079-4991. - 10:4(2020 Apr), pp. 786.1-786.16.
|Titolo:||Nanocomposite sprayed films with photo-thermal properties for remote bacteria eradication|
|Parole Chiave:||Bacteria eradication; Nanocomposites; Nanoparticles; Photo-thermal effect|
|Settore Scientifico Disciplinare:||Settore BIO/19 - Microbiologia Generale|
|Data di pubblicazione:||apr-2020|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.3390/nano10040786|
|Appare nelle tipologie:||01 - Articolo su periodico|