Autor: Minikayev, Roman - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Zależność własności strukturalnych wybranych azotków pierwiastków grup III i IV od temperatury i ciśnienia
Autorzy:: Minikayev, Roman
Współwytwórcy:: Paszkowicz, Wojciech (promotor)
Wydawca:: Institute of Physics of the Polish Academy of Science
Instytut Fizyki Polskiej Akademii Nauk
Powiązania:: Bibliografia przy rozdziałach
Opis:: 105 kart : il. (w tym kolor.), wykr. ; 31 cm
Dostawca treści:: RCIN - Repozytorium Cyfrowe Instytutów Naukowych

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Tytuł:: Hybrid upconverting/paramagnetic Fe3O4/Gd2O3:Er3+, Yb3+, Mg2+, Nd3+ nanoparticles : synthesis, characterization and biological applications
Autorzy:: Kamińska, Izabela
Sobczak, Kamil
Zhydachevskyy, Yaroslav
Wojciechowski, Tomasz
Minikayev, Roman
Sikora-Dobrowolska, Bożena
Lewińska, Sabina
Chojnacki, Michał
Fronc, Krzysztof
Tematy:: core/shell nanoparticles
upconversion
co-precipitation methods
HeLa tumor cells
confocal microscopy
paramagnetic; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Powiązania:: https://bibliotekanauki.pl/articles/59112946.pdf Link otwiera się w nowym oknie
Opis:: The goals of this work are to design and develop a technology for fabrication and study of multifunctional properties of core/shell nanoparticles (NPs) as magnetic/luminescent markers. The new hybrid core/shell Fe₃O₄/Gd₂O₃:1% Er³+, 18% Yb³+, 2.5% Mg²+, x% Nd³+ NPs doped with different concentrations of neodymium ions, where x = 0%, 0.5%, 0.75%, 1%, 2%, 4%, were synthesized by the co-precipitation method. The NPs were characterised using XRD, TEM, SEM, EDX, confocal microscopy and photoluminescence. Fe₃O₄ (core) consists of several 13 nm NPs. The core/shell NPs have sizes from 220 nm to 641 nm. In this latter case, the shell thicknesses were 72, 80, and 121 nm. The upconversion efficiency properties and magnetic properties of the hybrid NPs were investigated. In the core/shell NPs, the addition of Nd³+ quenches the luminescence. The magnetic response of core/shell samples is rather paramagnetic and does not differ significantly from that registered for the shell material alone. For Gd₂O₃:1% Er³+, 18% Yb³+ and Fe₃O₄/Gd₂O₃:1% Er³+, 18% Yb³+, 2.5% Mg²+, 0.5% Nd³+, at 300 K, the values of the magnetization registered at ~ 40 kOe are similar and equal to ~ 5.3 emu·g⁻¹. The survivability of the HeLa tumor cells with the presence of the core/shell NPs was investigated for 24 h. The NPs are non-toxic up to a concentration of 1000 μg·ml⁻¹ and penetrate cells in the process of endocytosis which has been confirmed by confocal microscope studies.
Dostawca treści:: Biblioteka Nauki

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