Synthesis of NaYF(4):Yb/Er/Gd up-conversion luminescent nanoparticles and luminescence resonance energy transfer-based protein detection.

ABSTRACT: High-quality NaYF₄:Yb/Er/Gd up-conversion nanoparticles (UCNPs) were first synthesized by a solvothermal method using rare earth stearate, sodium fluoride, ethanol, water, and oleic acid as precursors. Doped Gd³⁺ ions can promote the transition of NaYF₄ from cubic to hexagonal phase, shorten the reaction time, and reduce the reaction temperature without reducing the luminescence intensity of NaYF₄:Yb/Er UCNPs. X-ray diffraction, infrared spectroscopy, transmission electron microscopy, and luminescence spectroscopy were applied to characterize the UCNPs. The nanoparticles exhibited small size and excellent green up-conversion photoluminescence, making them suitable for biological applications. After the surfaces of NaYF₄:Yb/Er/Gd UCNPs were modified with amino groups through the Stöber meth

SUBMITTER: Zhang J 

PROVIDER: S-EPMC3366261 | biostudies-literature | 2012 Feb

REPOSITORIES: biostudies-literature