Comparative study of antibacterial efficiency of M-TiO2 (M = Ag, Cu) thin films grown by CVD

Autor: Maury, Francis, Mungkalasiri, Jitti, Bedel, Laurent, Emieux, Fabrice, Dore, Jeanne, Renaud, François N. R.
Přispěvatelé: Centre interuniversitaire de recherche et d'ingenierie des matériaux (CIRIMAT), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT), Commissariat à l'Energie Atomique et aux énergies alternatives - CEA (FRANCE), Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Université Claude Bernard-Lyon I - UCBL (FRANCE), Laboratoire de Microbiologie, Adaptation et Pathogénie - MAP (Lyon, France), Institut National Polytechnique de Toulouse - INPT (FRANCE)
Jazyk: angličtina
Rok vydání: 2014
Předmět:
Zdroj: Key Engineering Materials
Key Engineering Materials, Trans Tech Publications, 2014, vol. 617, pp. 127-130. ⟨10.4028/www.scientific.net/KEM.617.127⟩
Key Engineering Materials, 2014, vol. 617, pp. 127-130. ⟨10.4028/www.scientific.net/KEM.617.127⟩
ISSN: 1013-9826
1662-9795
DOI: 10.4028/www.scientific.net/KEM.617.127⟩
Popis: International audience; M-TiO2 (M = Ag, Cu) nanocomposite layers were grown by pulsed direct liquid injection chemical vapor deposition (DLICVD) on various substrates to produce bactericidal surfaces with long term activity. Monodisperse Ag nanoparticles (NPs) with an average size of 5-10 nm are embedded in an anatase matrix. A bactericidal behavior determined by the JIS Z 2801 standard test was found for Ag-TiO2 films for Ag ≤ 1 at. % and above. Higher Ag content is not necessary since efficiency is already at its maximum (relative activity 100%). By contrast, using Cu as antibacterial agent, a larger size distribution of metal particles was found (20 to 400 nm). Cu-TiO2 films exhibit a bactericidal behavior if their thickness is higher than 100 nm and Cu content ≥ 3.5 at. %. These coatings are still antibacterial after 5 months of aging and their efficiency has decreased by only 35%.
Databáze: OpenAIRE
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