Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/30249
Registo completo
Campo DC | Valor | Idioma |
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dc.contributor.author | Carvalho, P. | por |
dc.contributor.author | Sampaio, Paula | por |
dc.contributor.author | Azevedo, Sofia | por |
dc.contributor.author | Vaz, Catarina Oliveira | por |
dc.contributor.author | Espinós, J. P. | por |
dc.contributor.author | Teixeira, Vasco M. P. | por |
dc.contributor.author | Carneiro, Joaquim A. O. | por |
dc.date.accessioned | 2014-09-24T14:39:05Z | - |
dc.date.available | 2014-09-24T14:39:05Z | - |
dc.date.issued | 2014 | - |
dc.identifier.issn | 0169-4332 | por |
dc.identifier.uri | https://hdl.handle.net/1822/30249 | - |
dc.description | "Author's copy" | por |
dc.description.abstract | 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. | por |
dc.description.sponsorship | The work described in this paper was supported by project NANOPACKSAFER: NANO-engineered PACKaging systems for improving quality, SAFEty and health characteristics of foods, Portugal-Spain International Nanotechnology Laboratory Nanotechnology Projects Call; and also by the FEDER funding through the COMPETE program and FCT PEst-C/BIA/UI4050/2011 project. | por |
dc.language.iso | eng | por |
dc.publisher | Elsevier 1 | por |
dc.rights | openAccess | por |
dc.subject | ZnO thin films | por |
dc.subject | Magnetron sputtering | por |
dc.subject | Antimicrobial activity | por |
dc.subject | Food packaging | por |
dc.title | Influence of thickness and coatings morphology in the antimicrobial performance of zinc oxide coatings | por |
dc.type | article | - |
dc.peerreviewed | yes | por |
dc.relation.publisherversion | www.elsevier.com/locate/apsusc | por |
sdum.publicationstatus | published | por |
oaire.citationStartPage | 548 | por |
oaire.citationEndPage | 557 | por |
oaire.citationTitle | Applied surface science | por |
oaire.citationVolume | 307 | por |
dc.date.updated | 2014-09-06T18:30:48Z | - |
dc.identifier.doi | 10.1016/j.apsusc.2014.04.072 | por |
dc.subject.wos | Science & Technology | por |
sdum.journal | Applied Surface Science | por |
Aparece nas coleções: | CDF - GRF - Artigos/Papers (with refereeing) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Applied_Final article.pdf | 2,87 MB | Adobe PDF | Ver/Abrir |