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Influence of organic dopant-urease on sol-gel matrix optical properties in visible range.

Ulatowska A., Podbielska H.

Optica Applicata

2000

Vol. 30, nr 1

193-197

The preparation of sol-gel derived materials in the form of bulk and thin films as well as bulks with entrapped urease as an organic dopant is described. The absorbance spectra of urease solutions and sol-gel matrices were recorded in the transmission mode. The absorbance of sol-gel matrices with embedded enzyme was measured in the reflection mode.

Computer-aided microscopic examination of the structure of sol-gel glasses prepared in the form of thin films.

Ulatowska-Jarża A, Lechna-Marczyńska M., Podbielska H.

Optica Applicata

2000

Vol. 30, nr 4

537-542

For the studies described, the sol-gel matrices were prepared by way of acid hydrolysis. Thin films were produced in the form of thin layers covering the microscopic glasses. The optical microscope was used for examination of the sol-gel glass surfaces. The sol-gel materials produced from TEOS with various molar ratios R (ratio of the number of solvent moles to the number of TEOS moles) have been examined. The microscopic images were acquired by a computer and their Sobel transforms were calculated. The analysis of the experimental data showed that the sol-gel prepared with the molar ratio equal to 32 (R=32) are stable, do not crack and have smooth surface.