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Fine Control of the Amount of  Preferential <001> Orientation in DC Magnetron Sputtered Nanocrystalline TiO2 Films
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
2014 (English)In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 559, no 012011, 012011/1-012011/5 p.Article in journal (Refereed) Published
Abstract [en]

ABSTRACT: Different crystal facets of anatase TiO2 are known to have different chemical reactivity; in particular the {001} facets which truncates the bi-tetrahedral anatase morphology are reported to be more reactive than the usually dominant {101} facets. Anatase TiO2 thin films were deposited by reactive DC magnetron sputtering in Ar/O2 atmosphere and were characterized using Rietveld refined grazing incidence X-ray diffraction, atomic force microscopy and UV/Vis spectroscopy. By varying the partial O2 pressure in the deposition chamber, the degree of orientation of the grains in the film could be systematically varied with preferred <001> orientation changing from random upto 39% as determined by March-Dollase method. The orientation of the films is shown to correlate with their reactivity, as measured by photo-degradation of methylene blue in water solutions. The results have implications for fabrication of purposefully chemically reactive thin TiO2 films prepared by sputtering methods.

Full-text · Article · Nov 2014 · Journal of Physics Conference Series

Place, publisher, year, edition, pages
2014. Vol. 559, no 012011, 012011/1-012011/5 p.
National Category
Engineering and Technology
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URN: urn:nbn:se:uu:diva-284475OAI: oai:DiVA.org:uu-284475DiVA: diva2:920413
Available from: 2016-04-18 Created: 2016-04-18 Last updated: 2017-11-30

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Stefanov, B. I.Granqvist, C.-G.Österlund, Lars

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