Nanostructure and method for producing same

US12139796B2 · kind B2 · utility

Inventors

• Bruno Spindler · Oppenau, DE
• Patrick Doll · Rutesheim, DE
• Ralf Ahrens · Karlsruhe, DE
• Andreas Guber · Karlsruhe, DE

Key dates

• Filing date: Jul 2, 2020
• Grant date: Nov 12, 2024
• Expiry date: Dec 15, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2004/30
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A nanostructure is made of a plurality of nanocrystals on at least one surface or surface region of a titanium body. A method for generating such nanostructure is by means of hydrothermal oxidation. Thereby, the nanocrystals have a basic tetragonal-pyramidal shape, at least in some regions. The area density of the nanocrystals is between 40 and 400 per μm2, wherein the area density decreases with increasing crystal height. The average spacing of 50 to 160 nm of adjacent nanocrystals is obtained at a nanocrystal height of 23 to 100 nm. This provides a titanium-based, bactericidal and hydrophilic nanostructure for implant surfaces and, at the same time, a corresponding manufacturing method with which the size and distribution of the nanocrystals forming a nanostructure that facilitates healing can be determined.