Effect of dc glow discharge plasma treatment on PET/TiO₂ thin film surfaces for enhancement of bioactivity

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• 作者：K. Navaneetha P ; iyaraj ; V. Selvarajan ; Young Ha Rhee ; Hyoung Woo Kim ; Matteo Pavese
• 关键词：Glow discharge plasma ; PET/TiO₂ film ; XPS ; XRD ; SBF-in vitro analysis
• 刊名：Colloids and Surfaces B: Biointerfaces
• 出版年：2010
• 出版时间：1 August 2010
• 年：2010
• 卷：79
• 期：1
• 页码：53-60
• 全文大小：1548 K

文摘

In this paper, the surfaces of PET/TiO₂ thin film were modified by DC glow discharge plasma as a function of discharge potentials for improving the bioactivity. The hydrophilicity of the plasma-treated PET/TiO₂ film was measured by contact angle measurement and the surface energy was estimated by using Fowkes method. The structural and chemical composition of the plasma-treated PET/TiO₂ was analysed by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Immersion in a simulated body solution (SBF) solution was used to evaluate the bioactivity of the plasma-treated PET/TiO₂ samples in vitro. It was found that the plasma treatment modified the surfaces both in chemical composition and crystallinity which makes surface of the PET/TiO₂ to become more hydrophilic compared with untreated one. Analytical and microstructural investigations of SBF results, showed considerable higher rates of apatite formation on the plasma-treated PET/TiO₂ compared to the untreated films.