The luminescent properties of solid solutions Y 1-x Sc x PO 4 : 0.5 mol.% Eu 3+ (x=0,0.2, 0.4, 0.5, 0.6, 0.8, 1) under excitation by ultraviolet and vacuum-ultraviolet radiation were studied. influence disorder the crystal structure in on luminescence spectra is shown. A non-linear dependence values optical band gap solution composition was obtained a model suggested to explain this effect. Key...

We report the facile synthesis of TbIII and EuIII adducts able to elicit circularly polarized luminescence. Both sensitization lanthanide-ion-centered luminescence (i. e. antenna effect) chiral environment around metal ions are brought about by commercially available enantiopure 2,6-bis(oxazolinyl)pyridine ligands (PyBox). This strategy is promising for development a wide range new simple (CPL)...

Point defects in wide-bandgap semiconductors, particular hexagonal boron nitride, are promising candidates for single-photon emitters, used quantum informatics. We investigated cathodoluminescence of ion beam induced as well the effect prolonged electron irradiation on intensity luminescence. It has been shown that both band-to-band emission and defect related decreased after irradiation, durin...

A series of β-NaLuF4 crystals were synthesized via a hydrothermal method. Hexagonal phase microdisks, microprisms, and microtubes were achieved by simply changing the amount of citric acid in the initial reaction solution. Pure red upconversion (UC) luminescence can be observed in β-NaLuF4:Yb(3+), Tm(3+), Er(3+) and Li(+) doped β-NaLuF4:20% Yb(3+), 1% Tm(3+), 20% Er(3+). Based on the rate equat...

S h o z i Y a m a s h i t a a n d G i i t i T o m i t a Institute o f Biophysics , Facul ty o f Agriculture, K y u s h u University, Fukuoka 812, Japan Z. Naturforsch. 34b , 344-349 (1979); received October 17, 1978 Recombinat ion Luminescence, Tryptophan , Trapped Electron The effect o f LiCl on the delayed luminescence caused b y the recombination of photo e jected electrons with t ryptophan ...

An electrochemical system has been developed in order to assay the effect of hydrophobic molecules on the bioluminescence of bacterial luciferase (BL). The inhibition of BL luminescence by the long-chain n-alkyl alcohol has been examined using this system. The 1-heptanol, 1-octanol, 1-nonanol, 1-decanol, 1-undecanol and 1-dodecanol inhibited the BL reaction in a dose-dependent manner. The IC(50...

The effect of photoinhib i t ion on the pr imary ( O a ) and secondary ( O b ) quinone acceptors of photosystem I I was investigated in isolated spinach thylakoids by the methods of thermoluminescence and delayed luminescence. The amplitudes of the Q (at about 2 °C) and B (at about 30 °C) thermoluminescence bands which are associated w i th the recombination of the S ;OA and S2QB charge pairs, ...

We experimentally demonstrate strong spectral selectivity of plasmonic interaction that occurs between α-NaYF₄:Er3+/Yb3+ nanocrystals, which feature two emission bands, and spherical gold nanoparticles, with plasmon frequency resonant with one of the emission bands. Spatially-resolved luminescence intensity maps acquired for individual nanocrystals, together with microsecond luminescence lifeti...

objective(s): this paper describes synthesispolyvinyl alcohol/caf2:er nanofibers because of  its  photoluminescence properties.materials and methods:  first, caf2:er nanocomposite synthesized with co-precipitation method. in order to prepare polyvinyl alcohol (pva)/caf2:er nanofibers, caf2:er nanocomposites were added to the polyvinyl alcohol (pva) polymer. pva/caf2:er composite nanofibers were...