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Study of Structure Densification in TiO_2 Coatings Prepared by Magnetron Sputtering under Low Pressure of Oxygen Plasma Discharge

100%
Domaradzki J., Kaczmarek D., Prociow E., Radzimski Z.
Acta Physica Polonica A
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2011
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vol. 120
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issue 1
49-52
EN
Current work presents results of studies on structural and optical properties of the TiO_2 thin films prepared by reactive magnetron sputtering. Oxide thin films were deposited from metallic targets using oxygen gas only instead of usually used mixture of Ar-O_2. Additionally, an increased amplitude of unipolar pulses powering the magnetron has been applied. It is shown that all prepared coatings were stoichiometric and by changing only the discharge voltage it is possible to influence the resulting structural phase and optical properties of prepared thin films. Depending on conditions of magnetron powering, TiO_2 thin films had either the anatase structure with refraction index n = 2.1 (λ = 500 nm) or a high temperature stable rutile structure with n = 2.52 (λ = 500 nm).
2
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Characterization of Transparent and Nanocrystalline TiO_{2}:Nd Thin Films Prepared by Magnetron Sputtering

100%
Domaradzki J., Wojcieszak D., Prociow E., Kaczmarek D.
Acta Physica Polonica A
|
2009
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vol. 116
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issue S
S-75-S-77
EN
In this work structural and optical properties of TiO_{2} thin films doped with different amount of Nd have been outlined. The result have shown that by quantity of Nd amount in the film dense nanocrystalline or amorphous thin films were obtained.
3
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Thin Films Based on Nanocrystalline TiO_{2} for Transparent Electronics

88%
Prociow E., Sieradzka K., Domaradzki J., Kaczmarek D., Mazur M.
Acta Physica Polonica A
|
2009
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vol. 116
|
issue S
S-72-S-74
EN
In this work, investigations of structural, optical and electrical properties of transparent oxide semiconductor thin films based on TiO_{2} doped with Eu, Pd and Tb, Pd have been presented. The transparent oxide semiconductor nanocrystalline thin films were prepared by magnetron sputtering process. It was shown that doping with selected elements results in semiconducting properties of prepared thin films of oxides with p-(TiO_{2}:(Tb, Pd)) or n-type (TiO_{2}:(Eu, Pd)) of electrical conduction.
4
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Investigation of Optical Response of Gasochromic Thin Film Structures through Modelling of Their Transmission Spectra under Presence of Organic Vapor

88%
Domaradzki J., Mazur M., Wojcieszak D., Kaczmarek D., Jedrzejak T.
Acta Physica Polonica A
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2015
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vol. 127
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issue 6
1702-1705
EN
Properties of chromogenics materials have been of great interest for more than 50 years till now. Some examples of their practical application are photochromic lenses, electrochromic smart windows or even some examples of sensors devices based on gasochromic thin films have already been commercially available on the market. However, recognition of different physical and chemical processes that influence the optical response of such materials under changes in surrounding atmosphere is still an open subject for discussion. This work presents results of experimental and theoretical investigations of optical response of the two selected gasochromic (Ti-V-Ta-W)Ox and (Ti-V-Ta-Nb)Ox oxide thin films under ethanol vapor stimulations. Based on the measured experimental transmission spectra, the complex refraction index characteristics were plotted using optical models elaborated for the VIS-NIR spectral range. The models were further used for the prediction of optical responses of optical gas sensing structures with observed gasochromic behavior.
5
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Gasochromic Effect in Nanocrystalline TiO_{2} Thin Films Doped with Ta and Pd

76%
Domaradzki J., Prociow E., Kaczmarek D., Wojcieszak D., Gatner D., Lapinski M.
Acta Physica Polonica A
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2009
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vol. 116
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issue S
S-126-S-128
EN
In this work gasochromic effect in TiO_{2} thin films doped with palladium and tantalum (without catalyst film) have been described. The results have shown that in nanocrystalline TiO_{2}:(Ta, Pd), with anatase structure, the film colorization effect in alcohol presence was observed. Both colorization and also bleaching effect were stable and thermally activated.
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