Real Time,in situObservation of the Photocatalytic Destruction ofSaccharomyces cerevisiaeCells by Palladium-modified Nitrogen-doped Titanium Oxide Thin Film

doi:10.1016/j.jmst.2014.08.003

J. Mater. Sci. Technol. ›› 2015, Vol. 31 ›› Issue (1): 48-54.DOI: 10.1016/j.jmst.2014.08.003

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Real Time,in situObservation of the Photocatalytic Destruction ofSaccharomyces cerevisiaeCells by Palladium-modified Nitrogen-doped Titanium Oxide Thin Film

Jingtao Zhang¹, Qi Li^{1, *}, Ronghui Li¹, Jian Ku Shang^{1, 2}

1 Environment Functional Materials Division, Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China; 2 Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA

Received:2014-04-02 Online:2015-01-20 Published:2015-07-23
Contact: * Corresponding author. Ph.D.; Tel.: +86 24 83978028; Fax: +86 2423971215; E-mail address: qili@imr.ac.cn (Q. Li).
Supported by:
The experimental assistance on S. cerevisiae cell culture by Ms. Mian Song and Ms. Shuang Jiao was greatly appreciated. This study was supported by the National Natural Science Foundation of China (Grant No. 51102246), the Knowledge Innovation Program of Institute of Metal Research, Chinese Academy of Sciences (Grant No. Y0N5A111A1), the Youth Innovation Promotion Association, Chinese Academy of Sciences (Grant No. Y2N5711171), and the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry, China.

Abstract

Abstract: Palladium-modified nitrogen-doped titanium oxide (TiON/PdO) thin film was synthesized by the ion-beam-assisted deposition technique, which enabled a heavy nitrogen doping and the subsequent light absorption extension to ～700 nm for a better usage of the solar spectrum. Based on TiON/PdO thin film and a phase contrast microscope, a micro-reaction chamber was developed, which allowed the simultaneous optical excitation of the photocatalytic thin film and the phase contrast image observation of cells in it. The real time,in situobservation of the photocatalytic destruction ofSaccharomyces cerevisiae(S. cerevisiae), an essential eukaryotic unicellular model of living cells, was conducted with this new observation technique, which demonstrated clearly that the photocatalytic destruction effect was much stronger than the photodamage effect caused by the visible light irradiation alone in the disinfection process.

Key words: Ion-beam assisted deposition (IBAD), TiON/PdO thin film, Micro-reaction chamber, Visible-light, Photocatalytic destruction

Jingtao Zhang, Qi Li, Ronghui Li, Jian Ku Shang. Real Time,in situObservation of the Photocatalytic Destruction ofSaccharomyces cerevisiaeCells by Palladium-modified Nitrogen-doped Titanium Oxide Thin Film[J]. J. Mater. Sci. Technol., 2015, 31(1): 48-54.

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Real Time,in situObservation of the Photocatalytic Destruction ofSaccharomyces cerevisiaeCells by Palladium-modified Nitrogen-doped Titanium Oxide Thin Film

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