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One-Step Large-Scale Nanotexturing of Nonplanar PTFE Surfaces to Induce Bactericidal and Anti-inflammatory Properties
Jian Xu1, Haesoo Moon1, Jinjia Xu1
1Weldon School of Biomedical Engineering, Birck Nanotechnology Center, Center for Implantable Devices, Purdue University, West Lafayette, Indiana 47907, United States.
ACS Applied Materials & Interfaces
|May 22, 2020
Summary
A new nanotexturing method creates anti-bacterial and anti-inflammatory polytetrafluoroethylene (PTFE) surfaces. This simple oxygen plasma process enhances biomaterials for medical devices by reducing bacterial growth and improving tissue healing.
Area of Science:
- Biomaterials Engineering
- Surface Science
- Medical Device Technology
Background:
- Polytetrafluoroethylene (PTFE) is widely used in biomedical devices.
- Enhancing PTFE surface properties is crucial for improving device performance and biocompatibility.
- Existing surface modification techniques can be complex and costly.
Purpose of the Study:
- To develop a simple, scalable nanotexturing method for PTFE surfaces.
- To evaluate the antibacterial and anti-inflammatory properties of nanotextured PTFE.
- To assess the potential of nanotextured PTFE for biomedical applications.
Main Methods:
- Utilized a commercial desktop oxygen plasma etcher for nanotexturing.
- Applied the method to both planar (films) and nonplanar (tubes) PTFE samples.
- Characterized the resulting semiordered nanopillar structures for uniformity.
Main Results:
- Achieved high radial and axial uniformity in nanopillar structures on both sample types.
- Demonstrated significant *in vitro* bactericidal activity against *Staphylococcus aureus*.
- Showed improved *in vivo* anti-inflammatory responses in mice, including reduced inflammation and macrophage infiltration.
Conclusions:
- The developed nanotexturing process is simple, scalable, and effective for PTFE.
- Nanotextured PTFE surfaces exhibit promising antibiofouling and anti-inflammatory properties.
- This method offers a pathway to enhance the functionality of implantable and biomedical devices.
