Search results for " germanium doping"

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Hydrogen-Related Paramagnetic Centers in Ge-Doped Sol-Gel Silica Induced by γ-Ray Irradiation

2006

We have studied the generation mechanisms of H(II) paramagnetic centers in Ge-doped silica by investigating up to 104 mol ppm sol-gel Ge-doped silica materials. We have considered materials with the same concentrations of Ge but that are produced by two different densification routes that give rise to different concentrations of Ge-related oxygen deficient centers (GeODC(II)). These centers are characterized by an optical absorption band at ∼5.2 eV (B2 β band) and two related emissions at ∼3.2 eV and ∼4.3 eV. The GeODC(II) content was estimated by absorption and emission measurements. The H(II) centers were induced by room temperature γ-ray irradiation and their concentration was determined…

Materials scienceSilica gelDopingAnalytical chemistryGeneral ChemistryCondensed Matter PhysicsElectronic Optical and Magnetic Materialslaw.inventionBiomaterialschemistry.chemical_compoundParamagnetismchemistrylawAbsorption bandMaterials ChemistryCeramics and CompositesIrradiationAbsorption (chemistry)Electron paramagnetic resonancesol-gel glasses aerogel germanium doping germanium defects photosensitivityNuclear chemistrySol-gelJournal of Sol-Gel Science and Technology
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