Comparative Assessment of Antimicrobial Efficiency of Ionic Silver, Silver Monoxide, and Metallic Silver Incorporated onto an Aluminum Oxide Nanopowder Carrier. (17th September 2013)

• Record Type: Journal Article
• Authors: Jastrzębska, Agnieszka Maria; Karwowska, Ewa; Olszyna, Andrzej R.; Kunicki, Antoni R.
• Other Names: Kalishwaralal Kalimuthu Academic Editor.
• Is Part Of: Journal of nanoscience. Volume 2013(2013)
• Publication Date: 2013-09-17
• Subjects: Nanoscience -- Periodicals; Nanoscience; Periodicals; 500
• DOI: 10.1155/2013/263583
• Languages: English
• ISSNs: 2356-749X

Abstract

Abstract : The present paper provides comparative assessment of antimicrobial efficiency of ionic silver (Ag + ), silver monoxide (Ag2 O), and metallic silver (Ag) incorporated onto an aluminum oxide nanopowder carrier (Al2 O3 ). The deposition of Ag + ions, Ag2 O nanoparticles, and Ag nanoparticles on an different phases of aluminum oxide nanopowder carrier was realized using consecutive stages of dry sol-gel method. The Al2 O3 -Ag +, Al2 O3 -Ag2 O, and Al2 O3 -Ag nanopowders were widely characterized qualitatively and quantitatively by SEM, physical nitrogen sorption and XRD analyses. Results indicate that the Al2 O3 nanopowders added with Ag +, Ag2 O, and Ag, apart from phase composition, were not differing considerably from one another in terms of their morphology and physical properties. However, nanopowders of Al2 O3 -Ag were more agglomerated than Al2 O3 -Ag2 O and Al2 O3 -Ag + nanopowders. The antibacterial activity of the nanopowders was examined by the spread plate method using bacterial strains such as Escherichia coli, Sarcina lutea, and Bacillus subtilis . The best antibacterial properties against Sarcina lutea strain were achieved in the amorphous-Al2 O3 -Ag + and Al2 O3 -Ag2 O nanopowders, whereas the worst antimicrobial activity against Bacillus subtilis and Escherichia coli was shown by the Al2 O3 -Ag + and Al2 O3 -Ag nanopowders. The observed increase of the antibacterial activity as the silver content was not however significant for Al2 O3 -Ag nanopowders. The results obtained in the present experiments show that the Al2 O3 -Ag +, Al2 O3 -Ag2 O, and Al2 O3 -Ag nanopowders, possessing good bactericidal properties, can be produced by using consecutive stages of dry sol-gel method, and Al2 O3 nanopowder added with Ag2 O is considered as the best raw material in the production of antiseptic materials.