Bacteria Adherence Properties of Nitrogen-Doped TiO2 Coatings by Plasma Surface Alloying Technique
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2012年第3期
论文作者：王鹤峰 树学峰
文章页码：542 - 546
摘 要：In order to obtain a high-performance surface on 316L stainless steel （S. S） that can meet the requirements in medical material field environment, nitrogen-doped titanium dioxide （TiO2-xNx） was synthesized by oxidative annealing the resulted TiNx coatings in air. Titanium nitride coatings on 316L S. S were obtained by plasma surface alloying technique. The as-prepared coatings were characterized by X-ray diffraction, glow discharge optical emission spectrometer （GDOES）, scanning electron microscopy and X-ray photoelectron spectroscopy, respectively. The bacteria adherence property of the TiO2-xNx coatings on S. S on the oral bacteria Streptococcus Mutans was investigated and compared with that of S. S by fluorescence microscopy. The mechanism of the bacteria adherence was discussed. The results show that the TiO2-xNx coatings are composed of anatase crystalline structure. SEM measurement indicates a rough surface morphology with three-dimensional homogenous protuberances after annealing treatment. Because of the photocatalysis and positive adhesion free energy, the TiO2-xNx coatings inhibit the bacteria adherence.
王鹤峰1,2，树学峰1
1. Institute of Applied Mechanics and Biomedical Engineering, Taiyuan University of Technology2. Research Institute of Surface Engineering, Taiyuan University of Technology
摘 要：In order to obtain a high-performance surface on 316L stainless steel （S. S） that can meet the requirements in medical material field environment, nitrogen-doped titanium dioxide （TiO2-xNx） was synthesized by oxidative annealing the resulted TiNx coatings in air. Titanium nitride coatings on 316L S. S were obtained by plasma surface alloying technique. The as-prepared coatings were characterized by X-ray diffraction, glow discharge optical emission spectrometer （GDOES）, scanning electron microscopy and X-ray photoelectron spectroscopy, respectively. The bacteria adherence property of the TiO2-xNx coatings on S. S on the oral bacteria Streptococcus Mutans was investigated and compared with that of S. S by fluorescence microscopy. The mechanism of the bacteria adherence was discussed. The results show that the TiO2-xNx coatings are composed of anatase crystalline structure. SEM measurement indicates a rough surface morphology with three-dimensional homogenous protuberances after annealing treatment. Because of the photocatalysis and positive adhesion free energy, the TiO2-xNx coatings inhibit the bacteria adherence.
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