Synthesis and electrochemical study of a hybrid structure based on PDMS-TEOS and titania nanotubes for biomedical applications

Year: 2014

Authors: Castro A.G.B., Bastos A.C., Galstyan V., Faglia G., Sberveglieri G., Miranda Salvado I.M.

Autors Affiliation: Department of Materials and Ceramic Engineering/CICECO, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal; Universitŕ di Brescia, Dept. Informat. Engn., Sensor Lab and CNR-INO, Via Valotti 9, 25133 Brescia, Italy

Abstract: Metallic implants and devices are widely used in the orthopedic and orthodontic clinical areas. However, several problems regarding their adhesion with the living tissues and inflammatory responses due to the release of metallic ions to the medium have been reported. The modification of the metallic surfaces and the use of biocompatible protective coatings are two approaches to solve such issues. In this study, in order to improve the adhesion properties and to increase the corrosion resistance of metallic Ti substrates we have obtained a hybrid structure based on TiO2 nanotubular arrays and PDMS-TEOS films. TiO2 nanotubes have been prepared with two different diameters by means of electrochemical anodization. PDMS-TEOS films have been prepared by the sol-gel method. The morphological and the elemental analysis of the structures have been investigated by scanning electron microscopy and energy dispersive spectroscopy (EDS). Electrochemical impedance spectroscopy (EIS) and polarization curves have been performed during immersion of the samples in Kokubo’s simulated body fluid (SBF) at 37 degrees C to study the effect of structure layers and tube diameter on the protective properties. The obtained results show that the modification of the surface structure of TiO2 and the application of PDMS-TEOS film is a promising strategy for the development of implant materials.

Journal/Review: NANOTECHNOLOGY

Volume: 25 (36)      Pages from: 365701-1  to: 365701-10

More Information: This work has been supported by the FEDER funds, through the Program COMPETE, FCT (Fundacao para a Ciencia e Tecnologia) funds by the grant SFRH/BD/72074/2010 and the Italian Ministry of Education through the project FIRB ’Rete Nazionale di Ricerca sulle Nanoscienze ItalNanoNet’ (Protocollo: RBPR05JH2P, 2009-2013). We also want to acknowledge the program which is financing CICECO at present, Pest-C/CTM/LA0011/2011.
KeyWords: sol-gel coatings; TiO2 nanotubes; electrochemistry; biomedical applications; ion micro batteries
DOI: 10.1088/0957-4484/25/36/365701

ImpactFactor: 3.821
Citations: 9
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