Synthesis and electrochemical study of a hybrid structure based on PDMS-TEOS and titania nanotubes for biomedical applications
authors Castro, AGB; Bastos, AC; Galstyan, V; Faglia, G; Sberveglieri, G; Salvado, IMM
nationality International
journal NANOTECHNOLOGY
author keywords sol-gel coatings; TiO2 nanotubes; electrochemistry; biomedical applications
keywords SOL-GEL COATINGS; ION MICRO BATTERIES; TIO2 NANOTUBES; CORROSION BEHAVIOR; IMPEDANCE SPECTROSCOPY; STAINLESS-STEEL; TA6V ALLOY; NITI ALLOY; OXIDE; POLYDIMETHYLSILOXANE
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.
publisher IOP PUBLISHING LTD
issn 0957-4484
year published 2014
volume 25
issue 36
digital object identifier (doi) 10.1088/0957-4484/25/36/365701
web of science category Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied
subject category Science & Technology - Other Topics; Materials Science; Physics
unique article identifier WOS:000341807800013
link 25141030
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journal impact factor 3.404
5 year journal impact factor 3.467
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