1,720,981 research outputs found
Brunetin A., Sulcis R., Marinello F., Ciappa A., Vascotto V., Nanocomposites Films and Bottles for Packaging Applications: Process and Characterization, 2009.
No full textAtomic force acoustic microscopy for quantitative nanomechanical characterization of polymer blends
No full textCo-polymerization of carbon monoxide and olefins in the presence of layered silicates and organic/inorganic hybrid particles
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Effect of functional groups of modified polyolefins on the structure and properties of their composites with lamellar silicates
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Tecnologie innovative nella deposizione plasma assistita: il plasma jet a pressione atmosferica
No full textPolyolefin nanocomposites through reactive blending effect of functionalization on their structure and properties
No full textPhotoluminescence properties of YAG:Ce3+,Pr3+ phosphors synthesized via the Pechini method for white LEDs
No full textWe describe a facile route for synthesize
YAG nanophosphors via Pechini-type sol–gel process
for white light-emitting diodes technology. The wettype
synthesis was followed by a heat treatment at
1,000 C for 4 h. We carried out a study of the
luminescent properties of the YAG:Ce,Pr system
varying the concentration of praseodymium from
0.125 to 2 mol% maintaining the quantity of cerium
constant at 2 mol%. The diffractometric analysis
confirmed the purity of the YAG phase. The luminescent
analysis showed the typical Ce3? emission arising
from the 5d ! 4f transitions overlapped with the
sharper Pr3? emissions in the red region of the
spectrum. The presence of energy transfer phenomenon
was confirmed by PLE spectra of the samples
and the appearance of concentration quenching at
0.5 mol% Pr was observed thanks to the decrease both
of the intensity of praseodymium emission and mean
lifetime
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