Interconversion between non-bridging oxygen hole center and peroxy radical in F2-laser-irradiated SiO2 glass

Kajihara, Koichi; Skuja, Linards; Hirano, Masahiro; Hosono, Hideo

doi:10.1016/j.jnoncrysol.2004.08.026

Cited by 11 publications

(9 citation statements)

References 30 publications

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“…The reaction Eq. (10) is slower in a sample with a higher fictive temperature [99], implying that O 0 is less mobile in more disordered a-SiO 2 network. F 2 laser irradiation to a-SiO 2 containing both SiCl groups and interstitial O 2 produces interstitial chlorinerelated radicals (ClO Å…”

Section: Thermal Diffusion and Reactionsmentioning

confidence: 97%

Diffusion and reactions of interstitial oxygen species in amorphous SiO2: A review

Kajihara

Miura²,

Kamioka

et al. 2008

Journal of Non-Crystalline Solids

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121

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Section: Thermal Diffusion and Reactionsmentioning

confidence: 97%

Diffusion and reactions of interstitial oxygen species in amorphous SiO2: A review

Kajihara

Miura²,

Kamioka

et al. 2008

Journal of Non-Crystalline Solids

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121

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“…An analysis of the changes observed in the concentration of these centers under irradiation makes it possible to judge the transformations occurring in the microstructure of the material, to evaluate the deviation of the composition from stoichiometry, and to determine the degree of radiationinduced amorphization of crystalline SiO 2 modifications [2,[5][6][7]. Defect centers of this type can exist not only in silica glass but also in the structure of other amorphous matrices based on SiO 2 .…”

Section: Introductionmentioning

confidence: 99%

Luminescence of modified nonbridging oxygen hole centers in silica and alkali silicate glasses

Zatsepin¹,

Guseva

Zatsepin

2008

Glass Phys Chem

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This paper reports on the results of the investigation of the cathodoluminescence spectra of silica and alkali silicate glasses upon excitation with a pulsed electron beam (energy, 180 keV; current density, 700 A/cm 2 ; pulse duration, 2 ns). The luminescence band observed in the energy range 2.4-2.6 eV is assigned to modified structural defects of the ≡ Si-O·/ Me + type. These defects are revealed under high-density electronic excitation and, unlike the known L centers in alkali silicate glasses, are interpreted as a variety of nonbridging oxygen hole centers (defects of the dangling bond type) subjected to a disturbing action of the nearest neighbor alkali metal cations. The cathodoluminescence of similar centers is observed in neutron-irradiated silica glasses with lithium impurities; alkali silicate glasses with Li, Na, and K cations; and glasses in the two-alkali Na-K systems. It is established that the energy of the radiative transition of a modified nonbridging oxygen hole center, namely, ≡ Si-O·/ Me + , depends on the alkali cation type.

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“…Optical absorption spectrum was measured with a Jasco-V570 UV-vis-NIR spectrophotometer. The g 1 = 4.2636 signal should be ascribed to Fe 3+ impurity 12 responsible for the 400 nm emission in SSC, while the other two may be associated with paramagnetic defects in silicate glasses [13][14][15] or impurities ͑e.g., Cu 2+ , Fe 3+ ͒ ͑Ref. Electron spin resonance ͑ESR͒ measurements were carried out by using a JES-TE100 ESR spectrometer operating at X-band microwave frequency to detect paramagnetic defects and impurities in the glasses.…”

mentioning

confidence: 99%

Intense blue emission from tantalum-doped silicate glass

Meng

Murai

Fujita

et al. 2006

Applied Physics Letters

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Articles you may be interested inNear-infrared emission from Eu-Yb doped silicate glasses subjected to thermal reduction Appl. Phys. Lett. 98, 071911 (2011); 10.1063/1.3556316 Ultrabroadband near-infrared emission from a colorless bismuth-doped glass Appl. Phys. Lett. 90, 261110 (2007); 10.1063/1.2752539Broadband near-infrared emission from Tm 3 + ∕ Er 3 + co-doped nanostructured glass ceramics Efficient energy transfer from Si clusters to Er 3 + in complex silicate glassesThe authors report on an intense blue emission centered at 420 nm under ultraviolet excitation from pentavalent tantalum ion-doped silicate glasses. The blue emission is distinctly different from emission due to defects in silica glass, which is also reflected in both absorption spectrum and remarkably enhanced emission. The authors suggest that localized Ta 5d 0 energy level is responsible for the blue emission.

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Interconversion between non-bridging oxygen hole center and peroxy radical in F2-laser-irradiated SiO2 glass

Cited by 11 publications

References 30 publications

Diffusion and reactions of interstitial oxygen species in amorphous SiO2: A review

Diffusion and reactions of interstitial oxygen species in amorphous SiO2: A review

Luminescence of modified nonbridging oxygen hole centers in silica and alkali silicate glasses

Intense blue emission from tantalum-doped silicate glass

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