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Article
Preparation of porous silicon using magnesiothermic reduction of porous silica glass and electrode characteristics for lithium-ion batteries
Magnesiothermic reduction was applied to porous silica glass grains with a characteristically interconnected pore structure. The prepared porous silicon maintained the morphology with pore size of approximatel...
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Article
Radiation-induced valence conversion and photoluminescence of copper ions in aluminoborosilicate glasses
Radiation-induced valence conversion and the resultant radiophotoluminescence of Cu-doped aluminoborosilicate glasses were investigated. A prominent radiophotoluminescence was observed for Cu-doped 30Na2O⋅20Al2O3
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Article
Preparation, properties, and photodo** behavior of GeS2-, Ga2S3-, and Sb2S3-based glasses with excess sulfur and CsCl
Glasses were prepared in systems based on two stoichiometric sulfides that were selected from Ga2S3, GeS2, and Sb2S3, with the incorporation of excess sulfur and CsCl. We investigated the fundamental properties, ...
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Article
Li+ for Na+ ion-exchange-induced phase separation in borosilicate glass
Li+ for Na+ ion-exchange-induced phase separation in borosilicate glass was investigated. A glass with a composition, 70SiO2·15B2O3·15Na2O, was prepared. The glass was transparent, and macroscopically no phase se...
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Article
Coordination structure of implanted manganese ions in silica glass
180 keV Mn+ ions were implanted in silica glass at doses ranging from 1×1016 to 2×1017 ions/cm2 at room temperature. The coordination structure of implanted Mn atoms was studied by X-ray absorption spectroscopy. ...
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Article
Mid-infrared emissions from Er3+ in Ga2S3−GeS2−Sb2S3 glasses
Emission properties of Er3+ in Ga2S3–GeS2–Sb2S3 glasses at the mid-infrared region were investigated from the viewpoint of their dependence on the concentration of the active ion and the glass composition. In the...
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Article
Effect of glass composition on silver-incorporation into aluminoborosilicate glasses through a staining process
To fabricate graded-index optical elements by silver staining, we investigated the behavior of ion incorporation in aluminoborosilicate glasses, in which the contents of Al2O3 and Na2O were the same (in mol%). Th...
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Article
Copper(I) Halide Nanoparticle-dispersed Glasses Prepared by Copper Staining
Copper(I) chloride and bromide nanoparticle-dispersed glasses were prepared by means of a conventional copper staining. The staining was performed by the following process: copper stain was applied on the surf...
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Article
Structure of Cu Ions in (Cu + Halogen or Chalcogen)-Ion Implanted Silica Glasses
Structure of Cu ions in (Cl+Cu)-, (Br+Cu)-, (I+Cu)-, (S+Cu)- and (Se+Cu)-ion implanted silica glasses has been studied by x-ray absorption and optical absorption spectroscopies. Cu ions formed Cu-O bonds in th...
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Article
X-ray absorption fine structure study on the formation of Cu–Br bonds in (Br + Cu) ion implanted silica glass
The valence and coordination structure of implanted Cu and Br ions were investigated by x-ray absorption fine structure spectroscopy in (2.4 MeV 6 × 1016 Br2+ ions cm−2+ 2 MeV 6 × 1016 Cu+ ions cm−2)-implanted si...
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Article
Nonlinear Optical Responses of Spin-Coated Vanadium Oxide Films
We report on the third-order nonlinear optical responses of V2O5 films prepared by pyrolysis of spin-coated films of vanadium 2-ethylhexanoate. Temporal behavior of third-order optical nonlinearity of the spin-co...
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Article
Coordination structures of implanted Fe, Co, and Ni ions in silica glass by x-ray absorption fine structure spectroscopy
Coordination structures of implanted Fe, Co, and Ni ions were studied in 1.78–2.00-MeV 5 × 1016 ions/cm2-implanted silica glasses by x-ray absorption and optical absorption spectroscopies. It was found from x-ray...
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Article
X-ray Absorption Fine Structure Study on Coordination State of Implanted Gold Ions in Silica Glass
Coordination state of gold atoms implanted in silica glass to an energy of 1.5 MeV and a dose of 1 × 1017 ions/cm2 has been studied by x-ray absorption fine structure spectroscopy. It was found that most of the g...
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Article
Extended x-ray absorption fine structure study on amorphous Nd–Fe–B alloys
The local structure and crystallization behavior of Nd15Fe77Bxx = 2−14) melt-spun alloys were studied by Nd L3 extended x-ray absorption fine structure (EXAFS). The conventional x-ray powder diffractometry studie...
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Article
Structure of Au ultrafine particles in silica glass by x-ray absorption fine structure spectroscopy
The structure of ultrafine gold particles embedded in silica glass by ion implantation has been studied by x-ray absorption fine structure spectroscopy. It is found that the Au–Au interatomic distance in the p...
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Article
Large third-order optical nonlinearities in transition-metal oxides
ADVANCES in the field of optical computing1–3 will require the development of materials that combine a large nonlinear optical response with a fast response time. For many applications, this translates into a thi...
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Article
Nonlinear Optical Properties of Au Colloid-Doped Glasses
Degenerate four-wave mixing experiments have been performed for Au colloid-doped glasses prepared by melting and sputtering methods. The nonlinear optical properties of the glasses are discussed from viewpoint...
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Article
New halide glasses based on systems of CuX (X=Cl, Br, I)
