Wyniki wyszukiwania - BazTech

1

Optical properties of small silver particles embedded in soda-lime silica glasses

Suszyńska M., Morawska-Kowal T., Krajczyk L.

Optica Applicata

|

2010

|

Vol. 40, nr 2

397--401

EN

The optical characteristics of silver nanoparticles embedded in a surface layer of commercial soda lime silica glass have been analysed. Additional results were obtained by the transmission electron microscopy observations and the selective area electron diffraction patterns. In this report, we have shown the effect of deviation from the spherical shape and non-homogeneous distribution on the optical characteristics of the Ag nanocrystals embedded in the dielectric matrix under study.

2

Spectroscopic and dielectric characteristics of nickel-doped porous silica glasses

Macalik B., Suszyńska M., Rysiakiewicz-Pasek E., Krawczyk L., Morawska-Kowal T., Okal J.

Optica Applicata

|

2005

|

Vol. 35, nr 4

761-767

EN

The direct current conduction and electrical relaxation currents in nickel-doped porous silica glasses were investigated by using the thermally stimulated polarisation and depolarisation current techniques in a wide temperature range. Optical absorption measurements and transmission electron microscopy observations accompanied these studies. All characteristics were found to be affected by the porous matrix and the material filling the pores.

3

Interface interactions and optical properties of novel photonic nanocomposites consisting of porous glasses doped with organic luminophore molecules

Antropova T.V., Baran J., Gavrilko T., Gnatyuk I., Morawska-Kowal T., Melnik V., Puchkovska G., Vorobjev V.

Optica Applicata

|

2005

|

Vol. 35, nr 4

725-733

EN

Absorption and luminescence spectra of nanocomposites consisting of photonic molecules rhodamine 6G, trishydroxyquinoline aluminum (Alq3) complex and benzophenone adsorbed on soda-borosilicate porous glasses from ethanol and dichloromethane (DCM) solutions are investigated. The effect of sorption interactions at the interface between the glass pore surface and the organic media on luminescent and optical characteristics of the nanocomposites was investigated by NIR spectroscopy. It was shown that spectral changes observed in the absorption and emission spectra of the luminophores in the porous glasses are determined by the balance between physical interaction of the organic molecule with different adsorption centers on the pore walls and solvation effect.

4

Application of NIR spectroscopic method to the study of porous glasses filled with liquid crystals

Gavrilko T., Gnatyuk I., Puchkovska G., Baran J., Marchewka M., Morawska-Kowal T.

Optica Applicata

|

2003

|

Vol. 33, nr 1

23-32

EN

The paper focuses on NIR spectroscopic studies of the structure of surface active centers and interface interactions in novel nanocomposition materials built of nanoporous glasses (PG) and n-alkylcyanobiphenyl (nCB) liquid crystals (LC). NIR (12000–4000 cm–1) spectra of bare PG with pore size ranging from 2 to 10 nm and those loaded with nCB (n = 2, 4, 5, 8) were investigated at room temperature for two types of PG of variable surface activity preheated to 200 °C (type I) and 600 °C (type II). The number of surface active centers for the two types of PG has been evaluated as a function of pore diameter, and the relative number of the LC molecules directly bounded to the pore active centers was estimated.