Influence of the synthesis route on the spectroscopic, cytotoxic, and temperature-sensing properties of oleate-capped and ligand-free core/shell nanoparticles

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:606

Article

Jurga, Natalia¹  Przybylska, Dominika¹  Kaminski, Piotr¹  Tyminski, Artur¹  Grzeskowiak, Bartosz F.²  Grzyb, Tomasz¹ 

[1] Adam Mickiewicz Univ, Fac Chem, Dept Rare Earths, Uniwersytetu Poznanskiego 8, PL-61614 Poznan, Poland

[2] Adam Mickiewicz Univ, NanoBioMed Ctr, Wszechnicy Piastowskiej 3, PL-61614 Poznan, Poland

关键词: Nanoparticles;    Synthesis;    Core/shell;    Lanthanides;    Upconversion;    Surface modification;    Temperature sensing;    Cytotoxicity;   

DOI  :  10.1016/j.jcis.2021.08.093

来源: Elsevier

【 摘 要 】

The right choice of synthesis route for upconverting nanoparticles (UCNPs) is crucial for obtaining a welldefined product with a specific application capability. Thus we decided to compare the physicochemical, cytotoxic, and temperature-sensing properties of UCNPs obtained from different rare earth (RE) ions, which has been made for the first time in a single study. The core/shell NaYF4:Yb3+,Er3+/NaYF4 UCNPs were obtained by reaction in a mixture of oleic acid and octadecene, and their highly stable water colloids were prepared using the ligand-free modification method. Both oleate-capped and ligand-free UCNPs exhibited a bright upconversion emission upon 975 nm excitation. Moreover, slope values, emission quantum yields, and luminescence lifetimes confirmed an effective energy transfer between the Yb3+ and Er3+ ions. Additionally, the water colloids of the UCNPs showed temperature-sensing properties with a good thermal sensitivity level, higher than 1 % K-1 at 358 K. Evaluation of the cytotoxicity profiles of the obtained products indicated that cell viability was decreased in a dose-dependent manner in the analyzed concentration range. (C) 2021 The Authors. Published by Elsevier Inc.

【 授权许可】

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