Optical properties of erbium-doped xerogels embedded in porous anodic alumina

Гапоненко, Н. В.; Malyarevich, G. K.; Tsyrkunou, D.A.; Степанова, Е. А.; Мудрый, А. В.; Gusev, O. B.; Terukov, E. I.; Stepikhova, M. V.; Krasilnikova, L. V.; Drozdov, Yu. N.

doi:10.1016/j.optmat.2005.09.059

Cited by 10 publications

(5 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Noteworthy, the observed PLE spectrum of opal impregnated with titania xerogel differs significantly from the same erbium-doped xerogel in PAA, described recently [11] (Fig. 4(c)).…”

Section: Erbium In Opalmentioning

confidence: 39%

Modification of erbium photoluminescence excitation spectra for the emission wavelength 1.54μm in mesoscopic structures

Гапоненко

Unuchak

Мудрый

et al. 2006

Journal of Luminescence

Self Cite

View full text Add to dashboard Cite

“…Noteworthy, the observed PLE spectrum of opal impregnated with titania xerogel differs significantly from the same erbium-doped xerogel in PAA, described recently [11] (Fig. 4(c)).…”

Section: Erbium In Opalmentioning

confidence: 39%

Modification of erbium photoluminescence excitation spectra for the emission wavelength 1.54μm in mesoscopic structures

Гапоненко

Unuchak

Мудрый

et al. 2006

Journal of Luminescence

Self Cite

View full text Add to dashboard Cite

“…2 H 11/2 of erbium at 524 nm. 18 At this wavelength, PAA does not scatter significant light and erbium emission at 1.54 lm is not enhanced by the PAA. It is simply stronger than from spin-on films on monocrystalline silicon wafer because of the increased thickness of the xerogel/PAA structure.…”

Section: Resultsmentioning

confidence: 82%

Inhomogeneous nanostructured honeycomb optical media for enhanced cathodo- and under-x-ray luminescence

Гапоненко

Кортов

Rudenko

et al. 2012

Journal of Applied Physics

View full text Add to dashboard Cite

Photo-, radio-, and pulse cathodoluminescence spectra from sol-gel derived titania, doped with strontium and terbium, deposited on porous anodic alumina (PAA) films are reported. The morphology and qualitative elemental depth distributions have been examined by transmission electron microscopy, scanning electron microscopy, and radio-frequency glow discharge optical emission spectroscopy. PAA films with pore and cell sizes ranging from 170 to 190 and 240 to 270 nm, respectively, have been generated on aluminum and monocrystalline silicon substrates followed by spin-on sol-gel derived coating with the subsequent thermal treatment. The resultant PAA surface is not coated with a continuous xerogel film; the xerogel is mainly distributed near the pore bases, leaving much of the pore volume unfilled. The xerogel/PAA structures reveal terbium-related luminescence under x-ray excitation and cathodoluminescence. The same xerogels generated on monocrystalline silicon revealed no cathode- or under-x-ray luminescence. Thus, PAA enhances strongly the cathode- and under x-ray luminescence from terbium and strontium-doped titania xerogels confined in the porous matrix. The fabricated structures are considered as a type of low-cost, thin-film convertor of x-rays, and cathode ray irradiation into visible light, with an average cell size of the convertor of about 250 nm.

show abstract

“…The pore walls are coated with titanium oxide xerogel, and in this case the main pore volume remains unfilled and the planar side of the membrane is not coated with a continuous xerogel film. According to previous studies [6,14], the xerogel formed in the pores after heat treatment at 400 o C has a rather high degree of crystallinity (60%-80%) and an anatase crystal structure.…”

Section: Introductionmentioning

confidence: 91%

“…Alternatively, to us it seems feasible to form a porous titanium oxide by the sol-gel method, using the tubular surface of porous anodic aluminum oxide as the base [10][11][12][13][14].…”

mentioning

confidence: 99%

Titanium oxide xerogel films in porous aluminum oxide for photocatalytic application

et al. 2010

View full text Add to dashboard Cite

We have used the sol-gel method to synthesize titanium dioxide in the pores of an anodic aluminum oxide membrane. The samples were used for the test reaction of degradation of the organic dye rhodamine B. The concentration of the dye rhodamine B was monitored from the change in the absorption spectra in the 554 nm region, for an aqueous solution containing the dye and exposed to the emission from a mercury lamp. The synthesized samples of titanium oxide xerogel in the porous anodic aluminum oxide membrane are efficient photocatalysts for decomposition of organic dyes in an aqueous medium.Introduction. From the time photocatalytic decomposition of water on TiO 2 electrodes was discovered in 1972, photocatalytic oxidation of aqueous and gaseous contaminants has been studied intensively with the aim of solving the problem of environmental pollution [1][2][3][4]. Compared with other semiconductors, TiO 2 has found broad application due to its physical and chemical stability, corrosion resistance, low cost, and lack of toxicity. The TiO 2 bandgap width is 3.2 eV and 3.0 eV for anatase and rutile respectively [5]. Practically any organic compound can be oxidized on the surface of TiO 2 down to CO 2 and H 2 O, so design of photocatalysts based on TiO 2 to remove toxic organic substances from water and air is an important and quite realistic applied problem. Recently studies of catalytic processes using TiO 2 have been aimed at obtaining immobilized catalysts in the form of thin films with an extended surface and stable porous structure, making it possible to reduce energy costs associated with separation of reaction mixtures when using powdered catalysts [6].Accordingly, interest in photocatalysis has been focused on development of methods for synthesis of porous titanium oxide, such as anodizing titanium and obtaining semiconductor TiO 2 nanotubes for oxidative photoelectrochemistry [7], using pore-formers [8] and templates to form a regular mesoporous structure [9]. Films have been deposited both on the smooth surface of glass, metal, and silicon and also on the smooth surface obtained by etching borosilicate glass in hydrofluoric acid [8].Alternatively, to us it seems feasible to form a porous titanium oxide by the sol-gel method, using the tubular surface of porous anodic aluminum oxide as the base [10][11][12][13][14].Experimental Procedure. Samples of aluminum foil (99.99% pure) of thickness 0.2 mm were degreased in a solution based on potassium dichromate (3%) and sulfuric acid (80%) and, after washing and drying, were electrochemically polished in a mixture of ethanol and perchloric acid (5:1) at T ≤ 15

show abstract

Optical properties of erbium-doped xerogels embedded in porous anodic alumina

Cited by 10 publications

References 23 publications

Modification of erbium photoluminescence excitation spectra for the emission wavelength 1.54μm in mesoscopic structures

Modification of erbium photoluminescence excitation spectra for the emission wavelength 1.54μm in mesoscopic structures

Inhomogeneous nanostructured honeycomb optical media for enhanced cathodo- and under-x-ray luminescence

Titanium oxide xerogel films in porous aluminum oxide for photocatalytic application

Contact Info

Product

Resources

About