Electrochemical Characterization of the Solution Accessibility of CaTiO3 Microstructures and Improved Biomineralization

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• 作者：Daoai Wang ; Ying Liu ; Haiyuan Hu ; Zhixiang Zeng ; Feng Zhou ; Weimin Liu
• 刊名：Journal of Physical Chemistry C
• 出版年：2008
• 出版时间：October 16, 2008
• 年：2008
• 卷：112
• 期：41
• 页码：16123-16129
• 全文大小：428K
• 年卷期：v.112,no.41(October 16, 2008)
• ISSN：1932-7455

文摘

Electrochemical impedance spectroscopy (EIS) and Tafel plots measurements were employed to evaluate the accessibility of nanolamellate CaTiO₃ microstructures in Hanks’ solution. Flower-like CaTiO₃ microstructures were formed via the in situ hydrothermal synthesis on a titanium substrate and were superhydrophilic in nature. It had a very high corrosion rate but demonstrated improved biomineralization. The accessibility of solution to the surface was undermined by the modification with a thin hydrophobic silicone layer, which turned the surface to be superhydrophobic. EIS and Tafel measurements results showed that the corrosion rate of the superhydrophobic CaTiO₃ surface dramatically decreased with long-term stability in a 3.5 wt % NaCl solution. These Ti/CaTiO₃ composite materials can be very useful, especially as surgical implant materials, without hydrophobic modification and can be used as excellent anticorrosion materials after simple modification with a hydrophobic film.