Spectroscopic, structural and in vitro cytotoxicity evaluation of luminescent, lanthanide doped core@shell nanomaterials GdVO4:Eu3+5\%@SiO2@NH2
PBN-AR
Instytucja
Wydział Chemii (Uniwersytet im. Adama Mickiewicza w Poznaniu)
Informacje podstawowe
Główny język publikacji
en
Czasopismo
Journal of Colloid and Interface Science
ISSN
0021-9797
EISSN
Wydawca
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI
URL
Rok publikacji
2016
Numer zeszytu
Strony od-do
245-255
Numer tomu
481
Identyfikator DOI
Liczba arkuszy
Słowa kluczowe
en
Nanomaterials
Lanthanide ions
Luminescence
Orthovanadates
Surface modification
Cytotoxicity
Biocompability
Streszczenia
Język
en
Treść
The luminescent GdVO4:Eu3+ 5\%@SiO2@NH2 core@shell nanomaterials were obtained via co-precipitation method, followed by hydrolysis and co-condensation of silane derivatives: tetraethyl orthosilicate and 3-aminopropyltriethoxysilane. Their effect on human erythrocytes sedimentation and on proliferation of human lung microvascular endothelial cells was examined and discussed. The luminescent nanoparticles were synthesized in the presence of polyacrylic acid or glycerin in order to minimalize the agglomeration and excessive growth of nanostructures. Surface coating with amine functionalized silica shell improved their biocompatibility, facilitated further organic conjugation and protected the internal core. Magnetic measurements revealed an enhanced T1-relaxivity for the synthesized GdVO4:Eu3+ 5\% nanostructures. Structure, morphology and average grain size of the obtained nanomaterials were determined by X-ray diffraction, transmission electron microscopy and dynamic light scattering analysis. The qualitative elemental composition of the nanomaterials was established using energy-dispersive X-ray spectroscopy. The spectroscopic characteristic of red emitting core@shell nanophosphors was completed by measuring luminescence spectra and decays. The emission spectra revealed characteristic bands of Eu3+ ions related to the transitions 5D0-7F0,1,2,3,4 and 5D1-7F1. The luminescence lifetimes consisted of two components, associated with the presence of Eu3+ ions located at the surface of the crystallites and in the bulk.
Cechy publikacji
discipline:Biologia medyczna
discipline:Chemia
discipline:Fizyka
discipline:Inżynieria materiałowa
discipline:Medical biology
discipline:Chemistry
discipline:Physics
discipline:Materials science
Original article
Original article presents the results of original research or experiment.
Oryginalny artykuł naukowy
Oryginalny artykuł naukowy przedstawia rezultaty oryginalnych badań naukowych lub eksperymentu.
Inne
System-identifier
PBN-R:764060
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