Titania-silver and alumina-silver composite nanoparticles: Novel, versatile synthesis, reaction mechanism and potential antimicrobial application

Tanushree Bala; Gordon Armstrong; Fathima Laffir; Roibeard Thornton

doi:10.1016/j.jcis.2011.01.044

Titania-silver and alumina-silver composite nanoparticles: Novel, versatile synthesis, reaction mechanism and potential antimicrobial application

Tanushree Bala, Gordon Armstrong, Fathima Laffir, Roibeard Thornton

Research output: Contribution to journal › Article › peer-review

Abstract

Titania-silver (TiO₂-Ag) and alumina-silver (Al₂O₃-Ag) composite nanoparticles were synthesised by a simple, reproducible, wet chemical method under ambient conditions. The surface of the oxides was modified with oleic acid, which acted as an intermediate between the oxide surface and the silver nanoparticles. The resulting composite nanoparticles were thoroughly characterised by XRD, TEM, XPS, FTIR and TGA to elucidate the mode of assembly of Ag nanoparticles on the oxide surfaces. Epoxy nanocomposites were formulated with TiO₂-Ag and Al₂O₃-Ag to examine potential applications for the composite nanoparticles. Preliminary results from disc diffusion assays against Escherichia coli DH5α and Staphylococcus epidermidis NCIMB 12721 suggest that these TiO₂-Ag and Al₂O₃-Ag composite nanoparticles have potential as antimicrobial materials.

Original language	English
Pages (from-to)	395-403
Number of pages	9
Journal	Journal of Colloid and Interface Science
Volume	356
Issue number	2
DOIs	https://doi.org/10.1016/j.jcis.2011.01.044
Publication status	Published - 15 Apr 2011

Keywords

AlO-Ag
Antimicrobial
Composite
Epoxy polymer
Escherichia coli
Nanoparticle
Staphylococcus epidermidis
TiO-Ag

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10.1016/j.jcis.2011.01.044

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abstract = "Titania-silver (TiO2-Ag) and alumina-silver (Al2O3-Ag) composite nanoparticles were synthesised by a simple, reproducible, wet chemical method under ambient conditions. The surface of the oxides was modified with oleic acid, which acted as an intermediate between the oxide surface and the silver nanoparticles. The resulting composite nanoparticles were thoroughly characterised by XRD, TEM, XPS, FTIR and TGA to elucidate the mode of assembly of Ag nanoparticles on the oxide surfaces. Epoxy nanocomposites were formulated with TiO2-Ag and Al2O3-Ag to examine potential applications for the composite nanoparticles. Preliminary results from disc diffusion assays against Escherichia coli DH5α and Staphylococcus epidermidis NCIMB 12721 suggest that these TiO2-Ag and Al2O3-Ag composite nanoparticles have potential as antimicrobial materials.",

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AU - Laffir, Fathima

AU - Thornton, Roibeard

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KW - Composite

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KW - Escherichia coli

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Titania-silver and alumina-silver composite nanoparticles: Novel, versatile synthesis, reaction mechanism and potential antimicrobial application

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Keywords

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