Influence of thickness and coatings morphology in the antimicrobial performance of zinc oxide coatings

In this research work, the production of undoped and silver (Ag) doped zinc oxide (ZnO) thin films for food-packaging applications were developed. The main goal was to determine the influence of coatings morphology and thickness on the antimicrobial performance of the produced samples. The ZnO based...

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Detalles Bibliográficos
Autores: Carvalho, P., Sampaio, P., Azevedo, S., Vaz, C., Espinós, J.P., Texeira, V., Carneiro, J.O.
Tipo de recurso: artículo
Fecha de publicación:2014
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/98450
Acceso en línea:http://hdl.handle.net/10261/98450
Access Level:acceso abierto
Palabra clave:Thin films
Food packaging
ZnO
Antimicrobial activity
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spelling Influence of thickness and coatings morphology in the antimicrobial performance of zinc oxide coatingsCarvalho, P.Sampaio, P.Azevedo, S.Vaz, C.Espinós, J.P.Texeira, V.Carneiro, J.O.Thin filmsFood packagingZnOAntimicrobial activityIn this research work, the production of undoped and silver (Ag) doped zinc oxide (ZnO) thin films for food-packaging applications were developed. The main goal was to determine the influence of coatings morphology and thickness on the antimicrobial performance of the produced samples. The ZnO based thin films were deposited on PET (Polyethylene terephthalate) substrates by means of DC reactive magnetron sputtering. The thin films were characterized by optical spectroscopy, X-Ray Diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Scanning Electron Microscopy (SEM). The antimicrobial performance of the undoped and Ag-doped ZnO thin films was also evaluated. The results attained have shown that all the deposited zinc oxide and Ag-doped ZnO coatings present columnar morphology with V-shaped columns. The increase of ZnO coatings thickness until 200 nm increases the active surface area of the columns. The thinner samples (50 and 100 nm) present a less pronounced antibacterial activity than the thickest ones (200-600 nm). Regarding Ag-doped ZnO thin films, it was verified that increasing the silver content decreases the growth rate of Escherichia coli and decreases the amount of bacteria cells present at the end of the experiment © 2014 Elsevier B.V. All rights reserved.Peer ReviewedElsevierConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2014201420142014info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/98450reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésSíinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/984502026-05-22T06:33:51Z
dc.title.none.fl_str_mv Influence of thickness and coatings morphology in the antimicrobial performance of zinc oxide coatings
title Influence of thickness and coatings morphology in the antimicrobial performance of zinc oxide coatings
spellingShingle Influence of thickness and coatings morphology in the antimicrobial performance of zinc oxide coatings
Carvalho, P.
Thin films
Food packaging
ZnO
Antimicrobial activity
title_short Influence of thickness and coatings morphology in the antimicrobial performance of zinc oxide coatings
title_full Influence of thickness and coatings morphology in the antimicrobial performance of zinc oxide coatings
title_fullStr Influence of thickness and coatings morphology in the antimicrobial performance of zinc oxide coatings
title_full_unstemmed Influence of thickness and coatings morphology in the antimicrobial performance of zinc oxide coatings
title_sort Influence of thickness and coatings morphology in the antimicrobial performance of zinc oxide coatings
dc.creator.none.fl_str_mv Carvalho, P.
Sampaio, P.
Azevedo, S.
Vaz, C.
Espinós, J.P.
Texeira, V.
Carneiro, J.O.
author Carvalho, P.
author_facet Carvalho, P.
Sampaio, P.
Azevedo, S.
Vaz, C.
Espinós, J.P.
Texeira, V.
Carneiro, J.O.
author_role author
author2 Sampaio, P.
Azevedo, S.
Vaz, C.
Espinós, J.P.
Texeira, V.
Carneiro, J.O.
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Thin films
Food packaging
ZnO
Antimicrobial activity
topic Thin films
Food packaging
ZnO
Antimicrobial activity
description In this research work, the production of undoped and silver (Ag) doped zinc oxide (ZnO) thin films for food-packaging applications were developed. The main goal was to determine the influence of coatings morphology and thickness on the antimicrobial performance of the produced samples. The ZnO based thin films were deposited on PET (Polyethylene terephthalate) substrates by means of DC reactive magnetron sputtering. The thin films were characterized by optical spectroscopy, X-Ray Diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Scanning Electron Microscopy (SEM). The antimicrobial performance of the undoped and Ag-doped ZnO thin films was also evaluated. The results attained have shown that all the deposited zinc oxide and Ag-doped ZnO coatings present columnar morphology with V-shaped columns. The increase of ZnO coatings thickness until 200 nm increases the active surface area of the columns. The thinner samples (50 and 100 nm) present a less pronounced antibacterial activity than the thickest ones (200-600 nm). Regarding Ag-doped ZnO thin films, it was verified that increasing the silver content decreases the growth rate of Escherichia coli and decreases the amount of bacteria cells present at the end of the experiment © 2014 Elsevier B.V. All rights reserved.
publishDate 2014
dc.date.none.fl_str_mv 2014
2014
2014
2014
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/98450
url http://hdl.handle.net/10261/98450
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.811543

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