dc.contributor.author
Szyszka, Katarzyna
dc.contributor.author
Rewak-Soroczynska, Justyna
dc.contributor.author
Dorotkiewicz-Jach, Agata
dc.contributor.author
Ledwa, Karolina A. L.
dc.contributor.author
Piecuch, Agata
dc.contributor.author
Giersig, Michael
dc.contributor.author
Drulis-Kawa, Zuzanna
dc.contributor.author
Wiglusz, Rafal J.
dc.date.accessioned
2020-03-16T10:52:17Z
dc.date.available
2020-03-16T10:52:17Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/26981
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-26742
dc.description.abstract
The Eu3+ and Sr2+ ions co-doped hydroxyapatite nanopowders (Ca10(PO4)6(OH)2) were synthesized via a precipitation method and post heat-treated at 500 °C. The concentration of Eu3+ ions was established in the range of 0.5–5 mol% to investigate the site occupancy preference. The concentration of Sr2+ ions was set at 5 mol%. The structural and morphological properties of the obtained materials were studied by an X-ray powder diffraction, a transmission electron microscopy techniques and infrared spectroscopy. As synthesized nanoparticles were in the range of 11–17 nm and annealed particles were in the range of 20–26 nm. The luminescence properties in dependence of the dopant concentration and applied temperature were investigated. The 5D0 → 7F0 transition shown the abnormally strong intensity for annealed materials connected with the increase of covalency character of Eu3+–O2− bond, which arise as an effect of charge compensation mechanism. The Eu3+ ions occupied three possible crystallographic sites in these materials revealed in emission spectra: one Ca(1) site with C3 symmetry and two Ca(2) sites with Cs symmetry arranged as cis and trans symmetry. The antibacterial properties of Eu3+ and Sr2+ ions doped and co-doped hydroxyapatite nanopowders were also determined against Gram-negative pathogens such as Pseudomonas aeruginosa, Klebsiella pneumoniae and Escherichia coli. Obtained results suggest that both europium and strontium ions may implement antibacterial properties for hydroxyapatites. In the most cases, better antibacterial effect we noticed for dopants at 5 mol% ratio. However, the effect is strongly species- and strain-dependent feature.
en
dc.rights.uri
https://creativecommons.org/licenses/by/4.0/
dc.subject
Spectroscopy
en
dc.subject
Antibacterial activity
dc.subject.ddc
500 Naturwissenschaften und Mathematik::570 Biowissenschaften; Biologie::572 Biochemie
dc.title
Structural modification of nanohydroxyapatite Ca10(PO4)6(OH)2 related to Eu3+ and Sr2+ ions doping and its spectroscopic and antimicrobial properties
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation.articlenumber
110884
dcterms.bibliographicCitation.doi
10.1016/j.jinorgbio.2019.110884
dcterms.bibliographicCitation.journaltitle
Journal of Inorganic Biochemistry
dcterms.bibliographicCitation.volume
203
dcterms.bibliographicCitation.url
https://doi.org/10.1016/j.jinorgbio.2019.110884
refubium.affiliation
Physik
refubium.affiliation.other
Institut für Experimentalphysik
refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.eissn
0162-0134
dcterms.isPartOf.zdb
1491314-8