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Updated: Feb 4, 2026
09:35
Applying Dynamic Strain on Thin Oxide Films Immobilized on a Pseudoelastic Nickel-Titanium Alloy
Published on: July 28, 2020
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Hierarchical structures on nickel-titanium fabricated by ultrasonic nanocrystal surface modification
Xiaoning Hou1, Steven Mankoci2, Nicholas Walters3
1Department of Mechanical Engineering, University of Akron, Akron, OH 44325, USA.
Summary
Ultrasonic nanocrystal surface modification (UNSM) creates hierarchical structures on nickel-titanium implants, improving cell interaction and biocompatibility. This simple method enhances implant performance through increased hardness and corrosion resistance.
Area of Science:
- Biomaterials Engineering
- Surface Science
- Nanotechnology
Background:
- Hierarchical surface structures on metallic implants enhance cellular interactions and biocompatibility.
- Fabricating complex hierarchical structures directly on metallic implants remains challenging.
Purpose of the Study:
- To develop a simple, one-step method for creating hierarchical surface structures on metallic implants.
- To evaluate the impact of these structures on implant biocompatibility, corrosion resistance, and mechanical properties.
Main Methods:
- Utilized ultrasonic nanocrystal surface modification (UNSM) on a nickel-titanium (NiTi) alloy.
- UNSM involves high-frequency impacts of a tungsten carbide ball, generating microscale grooves and nanoscale wrinkles.
Main Results:
- UNSM successfully fabricated hierarchical surface structures on the NiTi alloy.
- Cell culture studies demonstrated improved cell adhesion and proliferation on UNSM-treated surfaces.
- UNSM-treated samples exhibited enhanced corrosion resistance.
- Surface hardness increased from 243 Hv to 296 Hv, and scratch hardness improved by 22%.
Conclusions:
- UNSM is a facile and effective technique for fabricating hierarchical structures on metallic implant materials.
- The enhanced surface properties (biocompatibility, corrosion resistance, mechanical strength) indicate UNSM's potential for advanced medical implants.
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