Thesis
Evaluation of mechanical damage on TiO₂ nanotubes with and without silver coating
Washington State University
Master of Science (MS), Washington State University
2013
Handle:
https://hdl.handle.net/2376/101360
Abstract
Titanium and its alloys have gained increasing importance as biomedical implants due to good mechanical properties, excellent corrosion resistance and more importantly good biocompatibility. The surface of an implant needs modification to enhance its bioactivity when interfacing with bone and natural tissue. The biological characteristics of implants can be enhanced by adding material with desired properties, changing the composition or removing unwanted material from the implant surface. A commonly used surface modification method is the electrochemical anodization, which has gained importance over the years due to its low cost and ease of processability. A nanotube (TiO2) layer is grown via anodization generally utilize fluoride based electrolyte. In this study, we have grown TiO2 nanotubes on a commercially pure (Cp-Ti) Titanium substrate using anodization method with hydrofluoric acid as the electrolyte. The main objective of this study was to evaluate the possible damages the nanotubes can endure when they are implanted into the bone. Also the nanotubes were heat treated at various temperatures to measure the temperature induced damage on them. Silver was deposited electrochemically on the nanotubes surface in the form of nanoparticles and thus damage study was done with and without the silver coating. The nanotubes and silver coatings were characterized using a Field Emission Scanning Electron v Microscope (FESEM). The silver release profiles were studied using an Atomic Absorption Spectrophotometer (AAS). In the second part, Stainless Steel (SS) implants were used as they are common implant materials for fracture management. Implant study was done in a similar manner as mentioned in the first part, with and without silver coating. The silver deposition on SS samples was characterized using FESEM and the silver release study was performed using the AAS. Also Contact angles and surface energy measurements were performed to measure surface properties before and after implantation.
Metrics
Details
- Title
- Evaluation of mechanical damage on TiO₂ nanotubes with and without silver coating
- Creators
- Anish Shivaram
- Contributors
- Amit Bandyopadhyay (Chair)Susmita Bose (Committee Member) - Washington State University, Mechanical and Materials Engineering, School ofAnita Vasavada (Committee Member) - Washington State University, Chemical Engineering and Bioengineering, School of
- Awarding Institution
- Washington State University
- Academic Unit
- Mechanical and Materials Engineering, School of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Identifiers
- 99900525390001842
- Language
- English
- Resource Type
- Thesis