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Permanent link (DOI): https://doi.org/10.7939/R3M91X

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Activity of Nanocrystalline Gold and Silver Alloys Open Access

Descriptions

Other title
Subject/Keyword
silver
gold
nanocrystal
wound dressing
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Unrau, Kevin R
Supervisor and department
Burrell, Robert (Biomedical Engineering)
McCaffrey, William (Chemical Engineering)
Examining committee member and department
Burrell, Robert (Biomedical Engineering)
McCaffrey, William (Chemical Engineering)
Tyrell, Greg (Laboratory Medicine and Pathology)
Department
Department of Chemical and Materials Engineering
Specialization
Chemical Engineering
Date accepted
2012-04-11T13:27:00Z
Graduation date
2012-06
Degree
Master of Science
Degree level
Master's
Abstract
Gold and silver dressing alloys were created by DC magnetron sputtering and compared with pure silver nanocrystalline dressings using conventional biological and physical characterization techniques. While the gold/silver dressings were weaker antimicrobials than the pure silver nanocrystalline structures, the addition of gold reduces the minimum crystallite size from 17 to 4 nm. This increases the number of grain boundary atoms from 12 to 40% which could augment the anti-inflammatory properties of the dressings. The formation of gold oxide (Au2O3) could be responsible for the observed decrease in crystallite size. Increasing the oxygen content of the dressings increased antimicrobial potency and dressing longevity. The oxygen tended to be combined in O-O bonds rather than Ag-O bonds. Heat treatment reduced both the antimicrobial and longevity parameters of the dressings. Sterilization by electron beam irradiation was determined to preserve the antimicrobial and longevity properties of the dressing the best.
Language
English
DOI
doi:10.7939/R3M91X
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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File author: Kevin
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