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Nanomaterials 2017, 7(1), 15;

Modification of the Surface Topography and Composition of Ultrafine and Coarse Grained Titanium by Chemical Etching

Saint Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
Author to whom correspondence should be addressed.
Academic Editor: Thomas Nann
Received: 27 October 2016 / Revised: 8 December 2016 / Accepted: 9 December 2016 / Published: 13 January 2017
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In this study, we present the detailed investigation of the influence of the etching medium (acidic or basic Piranha solutions) and the etching time on the morphology and surface relief of ultrafine grained (UFG) and coarse grained (CG) titanium. The surface relief and morphology have been studied by means of scanning electron microscopy (SEM), atomic force microscopy (AFM), and the spectral ellipsometry. The composition of the samples has been determined by X-ray fluorescence analysis (XRF) and X-ray Photoelectron Spectroscopy (XPS). Significant difference in the etching behavior of UFG and CG titanium has been found. UFG titanium exhibits higher etching activity independently of the etching medium. Formed structures possess higher homogeneity. The variation of the etching medium and time leads to micro-, nano-, or hierarchical micro/nanostructures on the surface. Significant difference has been found between surface composition for UFG titanium etched in basic and acidic Piranha solution. Based on the experimental data, the possible reasons and mechanisms are considered for the formation of nano- and microstructures. The prospects of etched UFG titanium as the material for implants are discussed. View Full-Text
Keywords: chemical etching; UFG titanium; surface; roughness; titanium implants chemical etching; UFG titanium; surface; roughness; titanium implants

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Nazarov, D.V.; Zemtsova, E.G.; Solokhin, A.Y.; Valiev, R.Z.; Smirnov, V.M. Modification of the Surface Topography and Composition of Ultrafine and Coarse Grained Titanium by Chemical Etching. Nanomaterials 2017, 7, 15.

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