Wettability of Thin Silicate-Containing Hydroxyapatite Films Formed by RF-Magnetron Sputtering

• Published in: Russian physics journal Vol. 56; no. 10; pp. 1163 - 1169
• Main Authors: Gorodzha, S. N., Surmeneva, M. A., Surmenev, R. A., Gribennikov, M. V., Pichugin, V. F., Sharonova, A. A., Pustovalova, A. A., Prymack, O., Epple, M., Wittmar, A., Ulbricht, M., Gogolinskii, K. V., Kravchuk, K. S.
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.02.2014; Springer
• Subjects: Analysis; Atomic force microscopy; Coatings; Coatings industry; Condensed Matter Physics; Hadrons; Heavy Ions; Lasers; Mathematical and Computational Physics; Nuclear Physics; Optical Devices; Optics; Photonics; Physics; Physics and Astronomy; Silicates; Steel, Stainless; Surface energy; Theoretical; Titanium; RF-magnetron sputtering; biocompatibility; wetting ability; calcium-phosphate coating
• ISSN: 1064-8887; 1573-9228
• DOI: 10.1007/s11182-014-0157-2

Using the methods of electron and atomic force microscopy, X-ray structural analysis and measurements of the wetting angle, the features of morphology, structure, contact angle and free surface energy of silicon-containing calcium-phosphate coatings formed on the substrates made from titanium VT1-0 and stainless steel 12Cr18Ni10Ti are investigated. It is shown that the coating – substrate system possesses bimodal roughness formed by the substrate microrelief and coating nanostructure, whose principal crystalline phase is represented by silicon-substituted hydroxiapatite with the size of the coherent scattering region (CSR) 18–26 nm. It is found out that the formation of a nanostructured coating on the surface of rough substrates makes them hydrophilic. The limiting angle of water wetting for the coatings formed on titanium and steel acquires the values in the following ranges: 90–92 and 101–104°, respectively, and decreases with time.