Wettability studies of topologically distinct titanium surfaces

Area of Science:

• Materials Science
• Biomedical Engineering
• Surface Chemistry

Background:

• Biomedical implants require optimal bone contact and osteointegration.
• Surface topography and properties of titanium implants influence these features.
• Nanoscale surface structures are hypothesized to improve protein binding and cell adhesion, enhancing implant lifespan.

Purpose of the Study:

• To investigate the wetting behavior of nanostructured titanium dioxide (TiO2) surfaces with water.
• To understand how nanoscale surface morphology and roughness affect water droplet interactions.
• To correlate surface nanofeatures with wetting dynamics and electrochemical properties.

Main Methods:

• Fabrication of titanium surfaces with controlled nanoporous and nanotubular structures.
• Monitoring the contact area of water droplets on different titanium surface topologies under controlled evaporation.
• Analyzing the time-dependency of contact area, contact angle, and electrochemical properties.

Main Results:

• Water droplet contact area decreased on hydrophobic planar titanium surfaces during evaporation.
• Contact area remained largely unaffected on hydrophobic nanorough titanium surfaces until complete evaporation.
• Nanoscale surface morphology and roughness significantly influence titanium dioxide surface-water droplet interactions, unlike microscale structures.

Conclusions:

• Surface morphology and roughness at the nanoscale critically affect the wetting behavior of titanium surfaces.
• These nanoscale effects on wetting are distinct from those observed at the microscale.
• Understanding these interactions is vital for designing advanced biomedical implants with improved performance and longevity.