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Raman study of TiO2 coatings modified by UV pulsed laser
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Paper Abstract

The TiO2 coatings were prepared by simple sol-gel method and modified by UV pulsed laser. TiO2, also know as titania, is a ceramic compound, existing in numerous polymorphic forms, mainly as tetragonal rutile and anatase, and rhomboidal brookite. Rutile is the most stable form of titanium dioxide, whereas anatase is a metastable form, created in lower temperatures than rutile. Anatase is marked with higher specific surface area, porosity and a higher number of surface hydroxyl groups as compared to rutile. The unique optical and electronic properties of TiO2 results in its use as semiconductors dielectric mirrors, sunscreen and UV-blocking pigments and especially as photocatalyst.

In this paper, the tetraisopropoxide was used as Ti precursor according to sol-gel method. An organic base was applied during sol preparation. Prepared gel was coated on glass substrates and calcined in low temperature to obtain amorphous phase of titania. Prepared coatings were modified by UV picosecond pulse laser with different pulse repetition rate and pulse power. Physical modification of the coatings using laser pulses was intended in order change the phase content of the produced material. Raman spectroscopy (RS) method was applied to studies of modified coatings as it is one of the basic analytical techniques, supporting the identification of compounds and obtaining information about the structure. Especially, RS is a useful method for distinguishing the anatase and rutile phases. In these studies, anatase to rutile transformation was observed, depending on laser parameters.

Paper Details

Date Published: 8 December 2016
PDF: 7 pages
Proc. SPIE 10159, Laser Technology 2016: Progress and Applications of Lasers, 101590V (8 December 2016); doi: 10.1117/12.2261655
Show Author Affiliations
Radosław Belka, Kielce Univ. of Technology (Poland)
Justyna Kęczkowska, Kielce Univ. of Technology (Poland)
Piotr Sęk, Kielce Univ. of Technology (Poland)

Published in SPIE Proceedings Vol. 10159:
Laser Technology 2016: Progress and Applications of Lasers
Ryszard S. Romaniuk; Krzysztof Kopczynski; Jan K. Jabczyński; Zygmunt Mierczyk, Editor(s)

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