News Column

Studies from INSTM Describe New Findings in Optical Research

May 13, 2014

By a News Reporter-Staff News Editor at Journal of Technology -- Research findings on Optical Research are discussed in a new report. According to news reporting out of Verona, Italy, by VerticalNews editors, research stated, "A series of europium doped (LuxGd1-x)(2)O-3 (x = 1, 0.75, 0.5, 0.25 and 0) nanocrystalline powders were prepared using a polymer complex solution method based on a polyethylene glycol (PEG) as fuel. The samples were systematically characterized by powder X-ray diffraction, scanning and transmission electron microscopies and luminescence spectroscopy."

Our news journalists obtained a quote from the research from INSTM, "The powders consisted of well-crystalline, cubic phase nanoparticles of 20-50 nm in size, which unit cell parameter increased with Gd content complying with Vegard's law. Upon blue light excitation all samples exhibited strong red luminescence typical of trivalent europium ion. The maximum splitting of the F-7(1) manifold changed linearly with the composition change and decreased with lowering of the crystal field strength. Relatively long lifetime values were obtained for D-5(0) (similar to 1.4 ms) and D-5(1) (similar to 120 mu s) levels. For all samples we estimated theoretical densities, refractive index coefficients, optical filling factors and Z(eff), in order to estimate the Judd-Ofelt intensity parameters and branching ratios. The calculated lifetime of D-5(0) level was in line with experimentally obtained luminescence lifetime values."

According to the news editors, the research concluded: "Relative integrated emissions were measured on all samples and Gd2O3 sample proved to have a maximum amount of the characteristic Eu3+ luminescence."

For more information on this research see: Structural and spectroscopic studies of Eu3+ doped Lu2O3-Gd2O3 solid solutions. Optical Materials, 2014;36(6):1083-1091. Optical Materials can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier -; Optical Materials -

Our news journalists report that additional information may be obtained by contacting R.M.K. Whiffen, INSTM, I-37134 Verona, Italy. Additional authors for this research include Z. Antic, A. Speghini, M.G. Brik, B. Bartova, M. Bettinelli and M.D. Dramicanin.

Keywords for this news article include: Italy, Verona, Europe, Optical Research

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Source: Journal of Technology

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