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Fine Control of the Amount of  Preferential <001> Orientation in DC Magnetron Sputtered Nanocrystalline TiO2 Films
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Fasta tillståndets fysik.
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Fasta tillståndets fysik.
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Fasta tillståndets fysik.
2014 (engelsk)Inngår i: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 559, nr 012011, s. 012011/1-012011/5Artikkel i tidsskrift (Fagfellevurdert) 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

sted, utgiver, år, opplag, sider
2014. Vol. 559, nr 012011, s. 012011/1-012011/5
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URN: urn:nbn:se:uu:diva-284475OAI: oai:DiVA.org:uu-284475DiVA, id: diva2:920413
Tilgjengelig fra: 2016-04-18 Laget: 2016-04-18 Sist oppdatert: 2017-11-30

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

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