Collagen nanofilm immobilized on at surfaces by electrodeposition method

Area of Science:

• Biomaterials Science
• Surface Chemistry
• Nanotechnology

Background:

• Titanium (Ti) and its alloys are widely used in biomedical implants.
• Enhancing the biocompatibility and osseointegration of titanium surfaces is crucial for implant success.
• Collagen immobilization is a key strategy to improve the bioactivity of titanium implants.

Purpose of the Study:

• To develop a simple electrodeposition method for preparing collagen nanofilms on anodic oxidized titanium (AT) surfaces.
• To characterize the functionalized titanium surfaces and assess their properties for biomolecule immobilization.
• To investigate the potential of electrodeposited titanium oxide (TiOx) layers for enhanced collagen binding.

Main Methods:

• Electrodeposition of collagen nanofilms onto anodic oxidized titanium (AT) surfaces.
• Surface characterization using scanning electron microscopy (SEM) and atomic force microscopy (AFM).
• Analysis of functional groups and crystalline structure using X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD).

Main Results:

• Successful preparation of collagen nanofilms (EAT) on AT surfaces.
• Identification of functional TiOx layers with anionic groups (--PO(4), --SO(4), --OH) on the AT surface.
• XRD confirmed the AT surface comprised mainly anatase and rutile.
• Electrodeposited TiOx layers exhibited lower water contact angles and higher surface energy compared to pure titanium (CT).
• Enhanced immobilization of collagen molecules was observed on the functionalized TiOx surfaces.

Conclusions:

• A straightforward electrodeposition method effectively creates bioactive collagen nanofilms on oxidized titanium.
• The functionalized TiOx layers possess properties conducive to improved collagen immobilization.
• This approach offers a promising strategy for developing advanced titanium-based biomaterials with enhanced biological performance.