Synthesis and characterization of GdO: Er, Ybdoped with Mg, Liions-effect on the photoluminescence and biological applications.

GdO:1% Er, 18% Yb,% Mg( = 0; 2.5; 4; 5; 6; 8;10; 20; 25; 50) and GdO:1% Er, 18% Yb, 2,5% Mg,% Li( = 0.5-2.

Single-step synthesis of Er and Yb ions doped molybdate/GdO core-shell nanoparticles for biomedical imaging.

Nanostructures as color-tunable luminescent markers have become major, promising tools for bioimaging and biosensing. In this paper separated molybdate/GdO doped rare earth ions (erbium, Er and ytterbium, Yb) core-shell nanoparticles (NPs), were fabricated by a one-step homogeneous precipitation process. Emission properties were studied by cathodo- and photoluminescence.

Mammalian cell defence mechanisms against the cytotoxicity of NaYF:(Er,Yb,Gd) nanoparticles.

Water-soluble upconversion nanoparticles (UCNPs), based on polyvinylpyrrolidone (PVP)-coated NaYF:Er,Yb,Gd, with various concentrations of Gd ions and relatively high upconversion efficiencies, were synthesized. The internalization and cytotoxicity of the thus obtained UCNPs were evaluated in three cell lines (HeLa, HEK293 and astrocytes). No cytotoxicity was observed even at concentrations of UCNPs up to 50 μg ml.

Growth and optical investigations of high quality individual CdTe/(Cd,Mg)Te core/shell nanowires.

CdTe nanowires with the average diameter of only 40 nm coated with (Cd,Mg)Te shells are grown using Au-catalyzed vapor-liquid-solid growth mechanism in a system for molecular beam epitaxy. High optical quality of individual nanowires is revealed by means of low temperature cathodoluminescence and micro-luminescence. It is found that, the optical emission spectrum consists mostly of the near band edge emission without any significant contribution of defect related luminescence.