XPS Study of Apatite Formed from Simulated Body Fluid on a Titanium Substrate Surface Nitrided by an Atmospheric Pressure Nitrogen Microwave Plasma

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  • Bai Jincheng
    Department of Applied Chemistry, Graduate School of Engineering, Faculty of Engineering, Saitama Institute of Technology
  • Nagashima Takuya
    Department of Life Science and Green Chemistry, Faculty of Engineering, Saitama Institute of Technology
  • Yajima Tatsuhiko
    Department of Applied Chemistry, Graduate School of Engineering, Faculty of Engineering, Saitama Institute of Technology Department of Life Science and Green Chemistry, Faculty of Engineering, Saitama Institute of Technology

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In this study, the surface of a titanium substrate was nitrided by successive exposure to carbon felt atmospheric pressure microwave plasma (CAMP) using a frequency of 2.45 GHz, an output power of 1000 W and an irradiation time of 120 s. The oxynitrided titanium substrate thus obtained was immersed in simulated body fluid at 36.5 °C for 120 hours to assess in vitro bioactivity, following which a crystal-like material was found to have covered the oxynitrided surface. X-ray photoelectron spectroscopy and X-ray diffraction revealed that the material was hydroxyapatite generated from the SBF, indicating that the surface of the oxynitrided titanium substrate was in vitro biocompatible.

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