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

• Published in: Journal of physical chemistry. C Vol. 112; no. 41; pp. 16123 - 16129
• Main Authors: Wang, Daoai, Liu, Ying, Hu, Haiyuan, Zeng, Zhixiang, Zhou, Feng, Liu, Weimin
• Format: Journal Article
• Language: English
• Published: American Chemical Society 16.10.2008
• Subjects: C: Surfaces, Interfaces, Catalysis
• ISSN: 1932-7447; 1932-7455
• DOI: 10.1021/jp8063323

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.