XANES study on coordination geometry of implanted Cu+ ions in silica glass: dependence on doses

Fukumi, Kohei; Chayahara, Akiyoshi; Kageyama, Hiroyuki; Kadono, Kohei; Kitamura, Naoyuki; Mizoguchi, H; Horino, Y.; Makihara, Masaki

doi:10.1016/s0022-3093(00)00102-2

Cited by 5 publications

(1 citation statement)

References 15 publications

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“…In contrast, we observed only a shoulder structure in the spectra of the Cu-air specimen and CuO. It has been recognized that the pre-edge feature corresponds to the absorption edge of Cu + , but Cu 2+ 23 – 25 . These results indicate that the Cu-Ar specimen includes most of the Cu in the monovalent state while most Cu ions in the Cu-air specimen was present in the divalent state.…”

Section: Resultscontrasting

confidence: 55%

Oxidation suppression of Cu in alkaline aluminophosphate glass and the effects for radiation-induced luminescence characteristics

Shiratori

Masai

Kato

et al. 2020

Sci Rep

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A glass phosphor is an attractive material for applications in radiation detections because of its high workability and availability with a wide range of chemical compositions. Recently, X-ray-induced luminescence of glasses containing various luminescent activators are actively investigated worldwide. In applications as phosphor, tailoring valence state of activators, which can take multiple valence states in glass, is very important. In this research, we studied effects of glass melting atmosphere on the valence state of copper-activator ion in alkaline aluminophosphate glasses and the radiation-induced luminescence characteristics. Optical absorption and X-ray absorption near edge structure spectra of Cu-doped glasses showed that the glass fused in Ar atmosphere contains higher concentration of Cu+ than those prepared in air. In addition, the presence of Cu+ enhances the photoluminescence (PL) quantum yield and PL kinetic constant. Furthermore, the increase of Cu+ concentration resulted an improvement of the X-ray-induced scintillation and thermally-stimulated luminescence intensity.

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Section: Resultscontrasting

confidence: 55%

Oxidation suppression of Cu in alkaline aluminophosphate glass and the effects for radiation-induced luminescence characteristics

Shiratori

Masai

Kato

et al. 2020

Sci Rep

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EPR of fluoroaluminate glasses implanted with titanium

Богомолова

Красильникова²,

Prushinsky

et al. 2001

Journal of Non-Crystalline Solids

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Electronic excitation and optical responses of metal-nanoparticle composites under heavy-ion implantation

Plaksin

Takeda

Amekura

et al. 2006

Journal of Applied Physics

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Measurements of optical transmission and ion-induced photon emission (IIPE) during implantation of copper ions into silica glass (a-SiO2) have been combined in order to study formation of Cu nanoparticles. It has been shown that in situ measurements are more advantageous than conventional experimental approaches of examining the properties of ion-implanted nanocomposites solely after implantation. Series of experiments have been done to prove that the band of IIPE at 545–550 nm originates from Cu+ solutes in a-SiO2. The combination of in situ optical techniques provides means of monitoring Cu nanoparticles and Cu solutes via the optical absorption in the range of the surface-plasmon resonance (SPR) of nanoparticles and the IIPE of Cu+ solutes. It has been shown that a simple linear approximation can be used to separate optical bands of defects, Cu solutes, and nanoparticles. Ion-induced transient optical absorption has been found in the ranges of SPR and defect bands. The transient optical response in the range of SPR has been tentatively attributed to a thermomodulation effect. We analyze relationships between electronic excitation, radiation-induced optical responses, and kinetics of nanoparticle formation. Several stages of nanoparticle formation have been distinguished: accumulation of Cu solutes, precipitation of Cu atoms, coalescence, growth of nanoparticles, and saturation of nanocomposites.

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XANES study on coordination geometry of implanted Cu+ ions in silica glass: dependence on doses

Cited by 5 publications

References 15 publications

Oxidation suppression of Cu in alkaline aluminophosphate glass and the effects for radiation-induced luminescence characteristics

Oxidation suppression of Cu in alkaline aluminophosphate glass and the effects for radiation-induced luminescence characteristics

EPR of fluoroaluminate glasses implanted with titanium

Electronic excitation and optical responses of metal-nanoparticle composites under heavy-ion implantation

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