Publications by authors named "Ladislav Cvrcek"
Pulsed micro-arc oxidation (MAO) in a strongly alkaline electrolyte (pH > 13), consisting of NaSiO⋅9HO and NaOH, was used to form a thin porous oxide coating consisting of two layers differing in chemical and phase composition. The unique procedure, combining MAO and removal of the outer layer by blasting, enables to prepare a coating suitable for application in temporary traumatological implants. A bilayer formed in an alkaline electrolyte environment during the application of MAO enables the formation of a wear-resistant layer with silicon incorporated in the oxide phase.
View Article and Find Full Text PDFGrowth of a TiNb adhesion interlayer for bioactive coatings.
Mater Sci Eng C Mater Biol Appl
November 2017
Surface bioactivity has been under intensive study with reference to its use in medical implants. Our study is focused on coatings prepared from an electroactive material which can support bone cell adhesion. Until now, hydroxyapatite films have usually been utilized as a chemically-active surface agent.
View Article and Find Full Text PDFDLC-type layers offer a good potential for application in medicine, due to their excellent tribological properties, chemical resistance, and bio-inert character. The presented study has verified the possibility of alloying DLC layers with titanium, with coatings containing three levels of titanium concentration prepared. Titanium was present on the surface mainly in the form of oxides.
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- The study investigates how human plasma fibrinogen and human serum albumin molecules adhere to a titanium-based surface, using advanced techniques like a diffractive optical element (DOE) sensor and variable angle spectro-ellipsometry (VASE) to analyze the surface properties.
- Findings indicate that fibrinogen creates a thicker and more compact layer on the surface compared to the more loosely bound layer formed by albumin.
- The research also explores the relationship between the electrical properties of certain titanium-doped hydrocarbon surfaces and their ability to adsorb fibrinogen, along with considerations regarding how aging of these surfaces might impact adsorption behavior.
Nowadays, a wide range of materials for human implants is used. To reach the required properties of implants, coatings are applied in some cases. This contribution is focused on the corrosion properties of TiN and ZrN layers on cp-titanium (commercially pure titanium) under environment modelling conditions in an oral cavity.
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- The study examines how human plasma fibrinogen (HPF) adsorbs on various treated titanium surfaces, including polished and titanium carbide coatings.
- An innovative diffractive optical element (DOE) sensor is used to monitor changes in permittivity and optical roughness when exposed to both the background electrolyte and HPF.
- Results indicate a correlation between the transmitted light and the thickness of the HPF layer, providing insights into the dynamics of fibrinogen adsorption at the nano-scale on different titanium surfaces.