Fluorescence properties of sol-gel materials doped with photosensitizers

• Autorzy: Hołowacz I. , Ulatowska-Jarża A. , Wysocka K. , Głuchowski W. , Stręk W. , Podbielska H.
• Języki publikacji: EN

Abstrakty

EN

Sol-gel materials may found plenty of applications, e.g., as carriers for various substances, which can be exploited for sensing purposes or as drug releasing carriers. In this work, the fluorescence properties of two photosensitizers immobilized in silica based sol-gel materials were examined. The sol-gel materials were produced from silica precursor TEOS and 96% ethyl alcohol as solvent. Materials with various ratios R (solvent to precursor molar ratio) 5, 15, 20, 32, 40, and 50, were prepared. Photolon and protoporphyrine PPIX were used as dopants in concentrations 0.001%, 0.005%, 0.01% and 0.05%. The excitation wavelength from a blue laser was 415 nm. The highest luminescence was observed for the material prepared with R = 20, whereas for R = 5 it was the lowest one. The fluorescence quenching for highest photosensitizer concentration was observed, as well.

Słowa kluczowe

EN

fluorescence; sol-gel material

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2008
• Tom: Vol. 38, nr 1
• Strony: 49--56
• Opis fizyczny: Bibliogr. 12 poz.

Twórcy

autor

Hołowacz I.

autor

Ulatowska-Jarża A.

autor

Wysocka K.

autor

Głuchowski W.

autor

Stręk W.

autor

Podbielska H.

• Bio-Optics Group, Institute of Biomedical Engineering and Instrumentation, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

Bibliografia

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