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Nanoscale colour control: W-O graded coatings deposited by magnetron sputtering
Czech Techical University, Dept. Control Engnineering, Faculty of Electrotechnical Engineering, Prague, Czech Republic.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics.
University Minho, Dept Phys, P-4710057 Braga, Portugal.
University Minho, Dept Phys, P-4710057 Braga, Portugal.
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2008 (English)In: Nanotechnology, ISSN 0957-4484, Vol. 19, no 39, 395202- p.Article in journal (Refereed) Published
Abstract [en]

A new design of decorative tungsten oxide coatings is presented. The coatings were deposited with a graded refractive index by magnetron sputtering from a tungsten target and pulsing the reactive gas. The controlled injection of the reactive gas can produce a concentration profile gradient from pure tungsten to tungsten trioxide, determining the final apparent colour of the coating. A dynamic sputtering model was built to simulate the growth of the coating during the reactive gas pulsing which was validated by direct measurement of the gradient of the oxygen content in the deposited coatings. Finally, these results were used for an optical model allowing the optical properties of the deposited tungsten oxide layer to be described, again validated by experimental analysis. This procedure allows the deposition of coatings with the desired colour by using the models to finding the optimal oxygen pulse parameters. This proposed method can be easily applied to almost any metal/metal oxide system.

Place, publisher, year, edition, pages
2008. Vol. 19, no 39, 395202- p.
Keyword [en]
National Category
Engineering and Technology
URN: urn:nbn:se:uu:diva-87610DOI: 10.1088/0957-4484/19/39/395202ISI: 000258538800005OAI: oai:DiVA.org:uu-87610DiVA: diva2:132789
Available from: 2009-01-02 Created: 2009-01-02 Last updated: 2009-10-07Bibliographically approved

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