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Materials 2016, 9(11), 862; doi:10.3390/ma9110862

Deposition of Ultrathin Nano-Hydroxyapatite Films on Laser Micro-Textured Titanium Surfaces to Prepare a Multiscale Surface Topography for Improved Surface Wettability/Energy

1
Department of Experimental Physics, National Research Tomsk Polytechnic University, Lenin Avenue 30, Tomsk 634029, Russia
2
Functional Materials, Materials Science Department, Saarland University, Saarbrücken 66123, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Mark T. Whittaker
Received: 22 July 2016 / Revised: 28 September 2016 / Accepted: 14 October 2016 / Published: 25 October 2016
(This article belongs to the Section Biomaterials)
View Full-Text   |   Download PDF [3744 KB, uploaded 25 October 2016]   |  

Abstract

The primary aim of this study was to analyse the correlation between topographical features and chemical composition with the changes in wettability and the surface free energy of microstructured titanium (Ti) surfaces. Periodic microscale structures on the surface of Ti substrates were fabricated via direct laser interference patterning (DLIP). Radio-frequency magnetron sputter deposition of ultrathin nanostructured hydroxyapatite (HA) films was used to form an additional nanoscale grain morphology on the microscale-structured Ti surfaces to generate multiscale surface structures. The surface characteristics were evaluated using atomic force microscopy and contact angle and surface free energy measurements. The structure and phase composition of the HA films were investigated using X-ray diffraction. The HA-coated periodic microscale structured Ti substrates exhibited a significantly lower water contact angle and a larger surface free energy compared with the uncoated Ti substrates. Control over the wettability and surface free energy was achieved using Ti substrates structured via the DLIP technique followed by the deposition of a nanostructured HA coating, which resulted in the changes in surface chemistry and the formation of multiscale surface topography on the nano- and microscale. View Full-Text
Keywords: biocompatible coating; hydroxyapatite; multiscale topography; rf magnetron sputtering; surface patterning biocompatible coating; hydroxyapatite; multiscale topography; rf magnetron sputtering; surface patterning
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Surmeneva, M.; Nikityuk, P.; Hans, M.; Surmenev, R. Deposition of Ultrathin Nano-Hydroxyapatite Films on Laser Micro-Textured Titanium Surfaces to Prepare a Multiscale Surface Topography for Improved Surface Wettability/Energy. Materials 2016, 9, 862.

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