Pure cubic phase ultra-small α-NaYF4:4 % Eu3+ colloidal nanoparticles were synthesized by thermal decomposition reaction using three various capping ligands, i.e., oleic acid, trioctylphosphine oxide, and hexadecylamine. To expose as many Eu3+ ions as possible to interactions with the surface-bounded ligands, the nanoparticles were fabricated to have the diameters below 10 nm. The geometrical s...

In connection with the chemical modification of protein, the photooxidation of histidine (His), tryptophan (Trp) and carnosine by singlet oxygen O2) is investigated by a Eu3+ luminescence probe ATTA-Eu3+ and UV Raman spectroscopy under physiological conditions (pH 7.5). The solutions ontaining both the luminescence probe ATTA-Eu3+(1× 10−5 M) and the different concentration of the biological tar...

CuAlO2 has been examined as a potential luminescent material by substituting Eu for Al cations in the delafossite structure. CuAlO2:Eu3+ nanofibers have been prepared via electrospinning for the ease of mitigating synthesis requirements and for future optoelectronics and emerging applications. Single-phase CuAlO2 fibers could be obtained at a temperature of 1100 °C in air. The Eu was successful...

In this paper, a novel nanophosphor, Y10W2O21:Eu, was synthesized through co-precipitation which is a simple and low-costing method. The structure and morphology of the nanocrystal samples were characterized by using XRD and FE-SEM. The emission spectra, excitation spectra and fluorescence decay curves were measured. J-O parameters, quantum efficiencies of Eu3+ 5D0 energy level, color coordinat...

This study presents a facile and green route for the synthesis of (La0.95Eu0.05)2O2S red phosphors of controllable morphologies, with the sulfate-type layered hydroxides of Ln2(OH)4SO4·2H2O (Ln = La and Eu) as a new type of precursor. The technique takes advantage of the fact that the precursor has had the exact Ln:S molar ratio of the targeted phosphor, thus saving the hazardous sulfurization ...

Các nano tinh thể (NC) ba thành phần CdS0,5Se0,5 (CdSSe) pha tạp ion Eu3+ đã được chế tạo công bằng phương pháp hoá ướt trong dung môi không liên kết ODE. Hình dạng và cấu trúc của các NC khảo sát thông qua phép đo hiển vi điện tử truyền (TEM) nhiễu xạ tia X (XRD). Tính chất quang nghiên cứu phổ kích thích huỳnh quang, thời gian sống quang. Phổ phát CdSSe cho thấy 5 đỉnh tại bước sóng 507 nm, 5...

This time-resolved immunofluorometric assay for human follitropin involves use of europium- or samarium-labeled monoclonal antibodies, with an average incorporation ratio of 3 mol of Eu3+ or Sm3+ per mole of antibody. These lanthanide ions are bound to the antibody molecules by means of the anhydride of diethylenetriaminepentaacetic acid. The solid-phase antibody is immobilized inside polystyre...

A new spectrofluorometric method is described for the determination of metacycline (MC), based on modified enzyme-amplified lanthanide luminescence. Under the optimum conditions, Eu3+-MC forms a ternary complex with lysozyme in close proximity. Then lysozyme can remarkably enhance the characteristic fluorescence intensity of Eu3+ at 612 nm in metacycline-Eu3+ binary complex. The enhanced fluore...