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Microstructural effect on the antimicrobial efficacy of arc ion plated TiO2

Published online by Cambridge University Press:  31 January 2011

C.J. Chung ,
H.I. Lin  and
J.L. He
C.J. Chung*
Affiliation:
Department of Materials Science and Engineering, Feng Chia University, Taichung 40724, Taiwan, Republic of China; and Department of Dental Laboratory Technology, Central Taiwan University of Science and Technology, Beitun District, Taichung 40601, Taiwan, Republic of China
H.I. Lin
Affiliation:
Department of Materials Science and Engineering, Feng Chia University, Taichung 40724, Taiwan, Republic of China
J.L. He
Affiliation:
Department of Materials Science and Engineering, Feng Chia University, Taichung 40724, Taiwan, Republic of China
*
a)Address all correspondence to this author. e-mail cjchung@seed.net.tw
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Abstract

Photocatalytic titanium dioxide coatings prepared via various processes have been developed for antimicrobial purposes. Among them is arc ion plating, which may provide more advantages than other processes such as high growth rate, strong film adhesion, as well as the ability to obtain anatase phase at a low deposition temperature. This research involves an arc ion plating method to produce TiO2 film on stainless steel. Antimicrobial efficacy is examined as a function of coating parameters. The experimental results show that the deposited film mainly consists of a rutile phase at an initial growth stage, followed by the growth of an anatase phase at a later stage. By increasing oxygen partial pressure, an increased volume of anatase phase is obtained. The volume of anatase phase is found to strongly and positively affect antimicrobial efficiency. Such an arc ion plated TiO2 coating can be potentially served for antimicrobial treatment of medical equipment.

Keywords

CoatingFilmIon plating
Type
Articles
Information
Journal of Materials Research , Volume 22 , Issue 11 , November 2007 , pp. 3137 - 3143
Copyright
Copyright © Materials Research Society 2007

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