Three-Layer Coating for Stents with Nanostructured Surface

Ulrich Beck; Regina Lange; U. Lembke; Hans Georg Neumann

doi:10.4028/www.scientific.net/KEM.396-398.627

Paper Titles

Structural Properties of Nanostructured Carbonate Apatites
p.611

Study and Characterization of Powders Nanocomposites Calcium Phosphate/Silica-Gel (SiO₂n) Obtained from Attrition Milling: For Biomedical Applications
p.615

Synthesis and Characterization of Nanostructured Ceramic Powders of Calcium Phosphate and Hydroxyapatite for Dental Applications
p.619

Synthesis of Nanostructured Hydroxyapatite: A Comparative Study between Sol-Gel and Aqueous Solution Precipitation
p.623

Three-Layer Coating for Stents with Nanostructured Surface
p.627

A Novel Bone Scaffolds Based on Hyperbranched Polyglycerol Fibers Filled with Hydroxyapatite Nanoparticles: In Vitro Cell Response
p.633

Assessing In Vitro Degradation of β-Tricalcium Phosphate Ceramics via Micro-Computed Tomography
p.637

Bioactive Ceramics Based on Nb₂O₅ and Ta₂O₅
p.641

Calcium Phosphate Porous Materials with Unique Microstructures
p.645

HomeKey Engineering MaterialsKey Engineering Materials Vols. 396-398Three-Layer Coating for Stents with Nanostructured...

Three-Layer Coating for Stents with Nanostructured Surface

Abstract:

A three-layer coating for stents with a nanostructured surface of calcium phosphate (CaP) is pre-sented. The coating stack consists of (a) a TiNbN layer deposited by physical vapour deposition and acting as diffusion barrier against allergenic ions, (b) a SiO2 xerogel layer providing good adhesion properties and designing the nanoporosity of the outer CaP layer (c) precipitated electrochemically. The verification of the SiO2-layer (and therewith its influence onto adhesion and structure of the outer CaP layer) succeeded only by use of XPS because of the very small amount of the xerogel. SEM results verified a homogeneous nanoscale nanoporous structure of the CaP coating. It is char-acterised by high adhesion strength. If applied for stent covering the nanoscale CaP coating has promising properties to initiate rapid endothelium formation and reduced risk of restenosis.