Effect of counter ions on the reduction process of Sm3+ ions in TiO2–ZrO2–Al2O3–SiO2 glasses

Kawamura, Go; Hayakawa, Tomokatsu; Nogami, Masayuki

doi:10.1016/j.jallcom.2004.11.084

Cited by 11 publications

(2 citation statements)

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“…As shown in Table IV, the q for 4 G 5/2 level of Sm 3+ in LKBPBG glasses was calculated to be 55%, which is higher than that of LBTAF glasses, 31 lower than the value in P 2 O 5 -K 2 O -BaO-BaF 2 -Al 2 O 3 glasses, 25 43 The reduction in the quantum efficiency for 4 G 5/2 level of Sm 3+ can be attributed to the MPR and energy transfer ͑ET͒ through cross-relaxation ͑CR͒ occurring during the stimulated emission process. As shown in Table IV, the q for 4 G 5/2 level of Sm 3+ in LKBPBG glasses was calculated to be 55%, which is higher than that of LBTAF glasses, 31 lower than the value in P 2 O 5 -K 2 O -BaO-BaF 2 -Al 2 O 3 glasses, 25 43 The reduction in the quantum efficiency for 4 G 5/2 level of Sm 3+ can be attributed to the MPR and energy transfer ͑ET͒ through cross-relaxation ͑CR͒ occurring during the stimulated emission process.…”

Section: ͑9͒mentioning

confidence: 90%

Optical evaluation of multichannel radiative transitions originating from G45/2 level of Sm3+ in heavy-metal-gallate glasses

Zhang

Yang

Pun

et al. 2010

Journal of Applied Physics

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Energy transfer characteristics of silicate glass doped with Er3+, Tm3+, and Ho3+ for 2μm emission J. Appl. Phys. 114, 243501 (2013); 10.1063/1.4852535 1.8 μ m emission of highly thulium doped fluorophosphate glasses J. Appl. Phys. 108, 083504 (2010); 10.1063/1.3499283 Spectroscopic properties and Judd-Ofelt theory analysis of Dy 3 + doped oxyfluoride silicate glassConventional visible and novel infrared ͑IR͒ emissions of Sm 3+ in heavy-metal-gallate glasses ͑Li 2 O-K 2 O -BaO-PbO-Bi 2 O 3 -Ga 2 O 3 , LKBPBG for short͒ with low phonon energy have been observed. Judd-Ofelt parameters ⍀ 2 ͑3.00ϫ 10 −20 cm 2 ͒, ⍀ 4 ͑5.19ϫ 10 −20 cm 2 ͒, and ⍀ 6 ͑1.69 ϫ 10 −20 cm 2 ͒ indicate a higher asymmetry and stronger covalent environment in the optical glasses. For the visible fluorescence bands peaked at 564, 601, 648, and 710 nm, the maximum stimulated emission cross-sections ͑ e ͒ were derived to be 1.35ϫ 10 −22 , 9.21ϫ 10 −22 , 9.58ϫ 10 −22 , and 3.91 ϫ 10 −22 cm 2 , respectively, the values are larger than those in phosphate, oxyfluoroborate, tellurite, and calibo glasses obviously. The observed 1185 nm IR emission lies in the low-loss window of telecommunication system, and the maximum value of e for this band was obtained to be 6.09 ϫ 10 −23 cm 2 . The characterization of multichannel radiative transitions of Sm 3+ in LKBPBG glasses is beneficial in exposing its potential applications in visible and IR optoelectronic devices.

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Section: ͑9͒mentioning

confidence: 90%

Optical evaluation of multichannel radiative transitions originating from G45/2 level of Sm3+ in heavy-metal-gallate glasses

Zhang

Yang

Pun

et al. 2010

Journal of Applied Physics

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“…However, the formation of AgNPs was irreversible. Therefore a TiO 2 component, which can be expected to capture electrons in a siloxane matrix at high temperatures, 24,25 was incorporated into the films for the purpose of oxidizing the AgNPs with heat treatment. Titanium ions are known to substitute for silicon ions in the fourcoordinated amorphous state of the organosilsesquioxane network.…”

Section: Resultsmentioning

confidence: 99%

Photoinduced reduction and heat-induced oxidation of silver in transparent RSiO3/2 and RSiO3/2–TiO2 films

Kawamura

Sato

Kogure

et al. 2010

Phys. Chem. Chem. Phys.

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Photoinduced reduction, resulting in nanoparticle formation, and heat-induced oxidation of doped silver have been demonstrated in silsesquioxane (RSiO(3/2)) and RSiO(3/2)-TiO(2) films (R = methyl, vinyl, and glycidoxypropyl) synthesized via the sol-gel method. The occurrence of redox behavior in the doped silver, i.e. formation and dissociation of silver nanoparticles (AgNPs) in the films, was confirmed by UV-Vis spectroscopy, IR spectroscopy, X-ray diffraction and transmission electron microscopy. The films containing vinyl and glycidoxypropyl organic functional groups were found to effectively reduce silver ions upon UV irradiation, whereas the film containing the methyl group substituent did not. Incorporation of a TiO(2) component into the RSiO(3/2) films caused thermal dissociation of the AgNPs. The formation and dissociation of AgNPs in the films was reversible by reiterating the cycle of UV irradiation and heat treatment.

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X-ray photoelectron spectroscopy of Sm3+-doped CaO–MgO–Al2O3–SiO2 glasses and glass ceramics

Tian

Cheng

Zhang

2011

Applied Surface Science

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Effect of counter ions on the reduction process of Sm3+ ions in TiO2–ZrO2–Al2O3–SiO2 glasses

Cited by 11 publications

References 9 publications

Optical evaluation of multichannel radiative transitions originating from G45/2 level of Sm3+ in heavy-metal-gallate glasses

Optical evaluation of multichannel radiative transitions originating from G45/2 level of Sm3+ in heavy-metal-gallate glasses

Photoinduced reduction and heat-induced oxidation of silver in transparent RSiO3/2 and RSiO3/2–TiO2 films

X-ray photoelectron spectroscopy of Sm3+-doped CaO–MgO–Al2O3–SiO2 glasses and glass ceramics

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