期刊
COLLOIDS AND SURFACES B-BIOINTERFACES
卷 79, 期 1, 页码 53-60出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfb.2010.03.023
关键词
Glow discharge plasma; PET/TiO2 film; XPS; XRD; SBF-in vitro analysis
资金
- Council of Scientific and Industrial Research, Government of India
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. (C) 2010 Elsevier B.V. All rights reserved.
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