Pure and 5 mol% Eu doped nickel oxide (NiO) nanoparticles were synthesized by microwave-assisted hydrothermal method. X-ray diffraction Rietveld refinement analysis confirmed the phase purity of prepared nanoparticles. Scanning electron microscopy revealed that undoped are porous flake-like structures while samples aggregated. photoelectron spectroscopy disclosed doping increases hole concentra...

As the world moves to greener and renewable energy generation technologies, scientific researchers are facing a great challenge of concurrently developing storage materials with low production cost, environmentally benign, high-energy density, good safety. In this work, we report on improved cycling reduced phase transformation well-studied n-Li2MnO3 achieved by doping Europium. It was establis...

We present an investigation of Er photoluminescence in Y2O3 waveguides codoped with Eu . As a function of europium concentration we observe an increase in decay rate of the erbium I11/2 energy level and an increase of the ratio of photoluminescence emission from the I13/2 and I11/2 states. Using a rate equation model, we show that this is due to an energy transfer from the I11/2→I13/2 transitio...

Fingerprints and trace explosives detection requires great sensitivity, which is provided by luminescence and appropriate physical and chemical treatments. Ninhydrin, 1,2-indanedione and other chemicals react with the amino acids present in the fingerprint residue. The chemically treated samples, on which the prints are to be detected, are excited with the blue lines 476.5 and 488 nm of an Argo...

The first fully structurally characterized ternary europium palladium hydrides (deuterides) are reported. The most Eu rich compound is Eu(2)PdD(4). Its beta-K(2)SO(4) type structure (space group Pnma, a = 749.47(1) pm, b = 543.34(1) pm, c = 947.91(1) pm, Z = 4) contains tetrahedral 18-electron [PdD(4)](4)(-) complex anions and divalent Eu cations. The compound is presumably nonmetallic and show...

Silica-encapsulated highly luminescent europium nanoparticles with a wide excitation range from UV to visible light (200-450 nm) have been prepared and used for streptavidin labeling and time-gated luminescence imaging of an environmental pathogen, Giardia lamblia.

We propose a new self-assembly based strategy for the design of novel lanthanide based luminescent materials. In this approach a europium hydrogel is prepared and sensitization is achieved by doping the gel with pyrene in a non-coordinated fashion.