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Silver containing sol-gel derived silica thin films: effect of aluminum incorporation on optical, microstructural and bactericidal properties
Date
2012-05-01
Author
Akgun, Betul Akkopru
Mellott, Nathan P.
Durucan, Caner
Metadata
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Silver containing silica (Ag-SiO2) thin films with and without aluminum (Al) were prepared on soda-lime-silica glass by spin coating of aqueous sols. The coating sol was formed through mixing tetraethyl orthosilicate [Si(OC2H5)(4)]/ethanol solution with aqueous silver nitrate (AgNO3) and aluminum nitrate nonahydrate [(AlNO3)(3)center dot 9H(2)O] solutions. The deposited films were calcined in air at 100, 300 and 500 A degrees C for 2 h and characterized using x-ray diffraction, UV-visible and x-ray photoelectron spectroscopy. The effect of Al incorporation and calcination treatment on microstructure and durability of the films, and chemical/physical state of silver in the silica thin film have been reported. The bactericidal activity of the films was also determined against Staphylococcus aureus via disk diffusion assay studies before and after chemical durability tests. The investigations revealed that the optical, bactericidal properties and chemical durability of Ag-SiO2 films can be improved by Al addition. The Al-modified Ag-SiO2 thin films do not exhibit any coloring after calcination in the range of 100-500 A degrees C, illustrating that silver is incorporated within the silica gel network in ionic form (Ag+). Al incorporation also improved the overall durability and antibacterial endurance of Ag-SiO2 thin films.
Subject Keywords
Sol-gel
,
SiO2 thin film
,
Silver nanoparticle
,
Antibacterial
,
Chemical durability
URI
https://hdl.handle.net/11511/37906
Journal
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
DOI
https://doi.org/10.1007/s10971-012-2718-6
Collections
Department of Metallurgical and Materials Engineering, Article
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B. A. Akgun, N. P. Mellott, and C. Durucan, “Silver containing sol-gel derived silica thin films: effect of aluminum incorporation on optical, microstructural and bactericidal properties,”
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
, pp. 240–251, 2012, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/37906.