Investigation on surface properties of TiO₂ films modified by DC glow discharge plasma

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• 作者：K. Navaneetha P ; iyaraj ; V. Selvarajan ; Matteo Pavese ; Polycarpos Falaras ; Dimitrios Tsoukleris
• 关键词：Glow discharge plasma ; TiO₂ film ; XPS ; AFM ; Blood compatibility
• 刊名：Current Applied Physics
• 出版年：2009
• 出版时间：September 2009
• 年：2009
• 卷：9
• 期：5
• 页码：1032-1037
• 全文大小：922 K

文摘

In the present work, TiO₂ films deposited on polyethylene terephthalate substrates by dip coating technique were subsequently treated by DC glow discharge plasma as a function of discharge potential. Hydrophilicity of these TiO₂ film surfaces was analyzed by contact angle measurements. Atomic force microscopy (AFM) revealed changes in surface morphology of the plasma treated TiO₂ films. Modifications in structural and chemical composition of the TiO₂ films were detected by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The blood compatibility of TiO₂ films was studied by in vitro investigation which includes thrombus formation and whole blood clotting time analysis (WBCT). It was found that the plasma treatment results in blood compatibility enhancement attributed to the structural, chemical and morphological properties of the modified film surfaces.