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https://hdl.handle.net/1822/71259
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Campo DC | Valor | Idioma |
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dc.contributor.author | Carvalho, Isabel | por |
dc.contributor.author | Dias, Nicolina Marques | por |
dc.contributor.author | Henriques, Mariana | por |
dc.contributor.author | Calderon V., Sebastian | por |
dc.contributor.author | Ferreira, Paulo | por |
dc.contributor.author | Cavaleiro, Albano | por |
dc.contributor.author | Carvalho, Sandra | por |
dc.date.accessioned | 2021-04-04T22:28:00Z | - |
dc.date.issued | 2020-05-08 | - |
dc.identifier.citation | Carvalho, Isabel; Dias, Nicolina M.; Henriques, Mariana; Calderon V. , Sebastian; Ferreira, Paulo; Cavaleiro, Albano; Carvalho, Sandra, Antibacterial effect of bimetallic clusters incorporated in amorphous carbon for stents application. ACS Applied Materials & Interfaces, 12(22), 24555-24563, 2020 | por |
dc.identifier.issn | 1944-8244 | por |
dc.identifier.uri | https://hdl.handle.net/1822/71259 | - |
dc.description.abstract | The purpose of this work is the development of Ag/a:C and Ag-Au/a:C coatings for ureteral stents, to provide them with antimicrobial characteristics. Silver was selected due to the well-known antibacterial properties, while gold was included to assess its capacity to accelerate the silver ion release forming a galvanic couple between Au and Ag. Thus, the metallic (Ag) and bimetallic clusters (Ag/Au) were produced by three different configurations: i) unbalanced magnetron sputtering (conventional sputtering), (ii) plasma gas condensation process and by (iii) a combination between both previous approaches. Coatings with Ag/Au bimetallic clusters were characterized by transmission electrons microscopy (TEM) in order to study the arrangement (alloy, core-shell and galvanic couple) of these particles in the carbon matrix. Inductively coupled plasma optical emission spectroscopy (ICP-OES) was used to quantify the Ag ions released through artificial urine from the different coatings deposited on thermoplastic polyurethane (TPU) tape (one of the materials used in the ureteral stent manufacture). Then, the antibacterial and cytotoxicity properties of Ag and Ag-Au/a:C coatings were evaluated. TEM shows that a biphasic structure was not detected, thus not allowing to anticipate the establishment of a galvanic couple. The ICP-OES results demonstrate that the silver ionization is mainly a function of the amount of silver incorporated in the amorphous carbon (a:C) matrix, and the formation of bimetallic alloy has a detrimental effect on release of the silver ions. The antibacterial activity was regulated by the silver ionization mechanisms since the coatings with higher Ag release had a higher antibacterial activity. | por |
dc.description.sponsorship | This study was supported by the Portuguese Foundation for Science and Technology (FCT) under the projects: PTDC/CTM-NAN/4242/2014, under the framework of the Strategic Funding; UIDB/04650/2019 and UIDB/04469/2020; BioTecNorte operation (NORTE-01-0145-FEDER-000004) funded by the European Regional Development Fund under the scope of Norte2020; CEMMPRE - UID/EMS/00285/2019 [co-financed via FEDER and FCT (COMPETE)]; ATRITO-0 (co-financed via FEDER (PT2020) POCI 01-0145-FEDER-030446 and FCT (PIDDAC)); On-SURF (co-financed via FEDER (PT2020) POCI-01-0247-FEDER-024521); IDMEC, under LAETA, project UID/EMS/50022/2019. | por |
dc.language.iso | eng | por |
dc.publisher | American Chemical Society | por |
dc.relation | PTDC/CTM-NAN/4242/2014 | por |
dc.relation | UIDB/04469/2020 | por |
dc.relation | UIDB/04650/2019 | por |
dc.relation | UID/EMS/00285/2019 | por |
dc.relation | UID/EMS/00285/2019 | por |
dc.relation | UID/EMS/50022/2019 | por |
dc.rights | restrictedAccess | por |
dc.subject | ureteral stent | por |
dc.subject | Ag/a:C | por |
dc.subject | Ag-Au/a:C | por |
dc.subject | sputtering | por |
dc.subject | condensation | por |
dc.subject | antibacterial | por |
dc.subject | cytotoxicity | por |
dc.title | Antibacterial effect of bimetallic clusters incorporated in amorphous carbon for stents application | por |
dc.type | article | - |
dc.peerreviewed | yes | por |
dc.relation.publisherversion | http://pubs.acs.org/journal/aamick | por |
dc.comments | CEB53665 | por |
oaire.citationStartPage | 24555 | por |
oaire.citationEndPage | 24563 | por |
oaire.citationIssue | 22 | por |
oaire.citationConferencePlace | United States | - |
oaire.citationVolume | 12 | por |
dc.date.updated | 2021-02-15T17:28:02Z | - |
dc.identifier.doi | 10.1021/acsami.0c02821 | por |
dc.date.embargo | 10000-01-01 | - |
dc.identifier.pmid | 32383580 | por |
dc.description.publicationversion | info:eu-repo/semantics/publishedVersion | - |
dc.subject.wos | Science & Technology | por |
sdum.journal | ACS Applied Materials & Interfaces | por |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series |
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document_53665_1.pdf Acesso restrito! | 995,52 kB | Adobe PDF | Ver/Abrir |