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https://hdl.handle.net/1822/66750
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Campo DC | Valor | Idioma |
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dc.contributor.author | Lazic, Vesna | por |
dc.contributor.author | Zivkovic, Ljiljana S. | por |
dc.contributor.author | Sredojevic, Dusan | por |
dc.contributor.author | Fernandes, Margarida Maria Macedo | por |
dc.contributor.author | Lanceros-Méndez, S. | por |
dc.contributor.author | Ahrenkiel, S. Phillip | por |
dc.contributor.author | Nedeljkovic, Jovan M. | por |
dc.date.accessioned | 2020-09-04T11:01:25Z | - |
dc.date.issued | 2020-07-30 | - |
dc.identifier.citation | Lazic, Vesna; ivkovic, Ljiljana S; Sredojevic, Duan; Fernandes, Margarida; Lanceros-Méndez, Senentxu; Ahrenkiel, S. Phillip; Nedeljkovic, Jovan M., Tuning properties of cerium dioxide nanoparticles by surface modification with catecholate-type of ligands. Langmuir, 36(33), 9738-9746, 2020 | por |
dc.identifier.issn | 0743-7463 | por |
dc.identifier.uri | https://hdl.handle.net/1822/66750 | - |
dc.description.abstract | Cerium dioxide (CeO2) finds applications in areas such as corrosion protection, solar cells, or catalysis, finding increasing applications in biomedicine. This work reports on surface-modified CeO2 particles in order to tune their applicability in the biomedical field. Stable aqueous cerium dioxide (CeO2) sol, consisting of 3-4 nm in size crystallites, was synthesized using forced hydrolysis. The coordination of catecholate-type of ligands (catechol, caffeic acid, tiron, and dopamine) to the surface-Ce atoms is followed with the appearance of absorption in the visible spectral range as a consequence of interfacial charge transfer complex formation. The spectroscopic observations are complemented with the density functional theory calculations using a cluster model. The synthesized samples were characterized by X-ray diffraction analysis, transmission electron microscopy, and nitrogen adsorption-desorption isotherms. The zeta-potential measurements indicated that the stability of CeO2 sol is preserved upon surface modification. The pristine CeO2 nanoparticles are non-toxic against pre-osteoblast cells in the entire studied concentration range (up to 1.5 mM). Hybrid CeO2 nanoparticles, caped with dopamine or caffeic acid, display toxic behavior for concentrations ? 0.17 and 1.5 mM, respectively. On the other hand, surface-modified CeO2 NPs with catechol and tiron promote the proliferation of pre-osteoblast cells. | por |
dc.description.sponsorship | This project was carried out within the Bilateral project between the Portuguese Republic and the Republic of Serbia (no. 337-00-00227/2019-09/14). Serbian team was supported by the Ministry of Education, Science and Technological Development of the Republic of Serbia. The authors thank the FCT - Fundação para a Ciência e Tecnologia - for financial support under framework of the Strategic Funding UID/FIS/ 04650/2020 and the SFRH/BPD/121464/2016 grant (M.M.F.). | por |
dc.language.iso | eng | por |
dc.publisher | American Chemical Society | por |
dc.relation | 337-00-00227/2019-09/14 | por |
dc.relation | UID/FIS/04650/2020 | por |
dc.relation | SFRH/BPD/121464/2016 | por |
dc.rights | restrictedAccess | por |
dc.title | Tuning properties of cerium dioxide nanoparticles by surface modification with catecholate-type of ligands | por |
dc.type | article | - |
dc.peerreviewed | yes | por |
dc.relation.publisherversion | http://pubs.acs.org/journal/langd5 | por |
dc.comments | CEB53844 | por |
oaire.citationStartPage | 9738 | por |
oaire.citationEndPage | 9746 | por |
oaire.citationIssue | 33 | por |
oaire.citationVolume | 36 | por |
dc.date.updated | 2020-08-31T11:42:36Z | - |
dc.identifier.eissn | 1520-5827 | por |
dc.identifier.doi | 10.1021/acs.langmuir.0c01163 | por |
dc.date.embargo | 10000-01-01 | - |
dc.identifier.pmid | 32787065 | por |
dc.description.publicationversion | info:eu-repo/semantics/publishedVersion | - |
dc.subject.wos | Science & Technology | por |
sdum.journal | Langmuir | por |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series |
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document_53844_1.pdf Acesso restrito! | 3,87 MB | Adobe PDF | Ver/Abrir |