Multifunctional Platform for Covalent Titanium Coatings: Micro-FTIR, XPS, and NEXAFS Characterizations

Area of Science:

• Biomaterials Science
• Surface Chemistry
• Nanotechnology

Background:

• Titanium's biocompatibility is crucial for biomedical implants, but long-term stability is challenged by inflammation and infections.
• Current surface modification methods often rely on harsh organic solvents.
• Need for robust, covalently bonded coatings to improve implant longevity and performance.

Purpose of the Study:

• To create a versatile, multifunctional platform for immobilizing macromolecules on titanium surfaces.
• To develop a stable covalent grafting method using organic linkers and green solvents.
• To enhance the biocompatibility and longevity of titanium-based biomedical devices.

Main Methods:

• Preparation and characterization of a functionalized titanium surface using three distinct organic linkers.
• Utilized green solvents for surface modification, offering an eco-friendly alternative to traditional methods.
• Surface characterization via micro-Fourier transform infrared spectroscopy (micro-FTIR), X-ray Photoelectron spectroscopy (XPS), and Near-Edge X-ray Absorption Fine Structure (NEXAFS).

Main Results:

• Successfully demonstrated robust covalent grafting of macromolecules onto titanium surfaces.
• NEXAFS analysis confirmed the orientation of linker molecules relative to the titanium surface.
• Covalently attached polymers (alginate and PDMAEMA) improved surface biocompatibility.

Conclusions:

• The developed platform provides a stable and versatile method for creating permanent polymeric coatings on titanium.
• This approach is a promising strategy for extending the lifespan and improving the clinical performance of biomedical implants.
• The use of green solvents aligns with sustainable practices in materials science.