Surf ace structure and apatite-forming ability of polyethylene substrates irradiated by oxygen cluster ion beams
| Autor: | Gikan H. Takaoka, Kazunori Miyamoto, Rei Araki, Satomi Itoh, Masakazu Kawashita |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Předmět: |
polyethylene
Materials science Surface Properties Simulated body fluid Inorganic chemistry Biomedical Engineering Nucleation Biocompatible Materials In Vitro Techniques Acceleration voltage Apatite Ion Biomaterials chemistry.chemical_compound Coated Materials Biocompatible X-Ray Diffraction Apatites Materials Testing Irradiation Spectrum Analysis X-Rays Metals and Alloys Polyethylene Body Fluids cluster ion beam Monomer chemistry simulated body fluid visual_art apatite Bone Substitutes Ceramics and Composites visual_art.visual_art_medium Microscopy Electron Scanning oxygen |
| Zdroj: | JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART A. (4):995-1003 |
| ISSN: | 1549-3296 |
| Popis: | Polyethylene (PE) substrates were irradiated at a dose of 1 × 1015 ions/cm2 by the simultaneous use of oxygen (O2) cluster and monomer ion beams. The acceleration voltage for the ion beams was varied from 3 to 9 kV. Unirradiated and irradiated PE substrates were soaked for 7 days in a metastable calcium phosphate solution (1.5SBF) that had 1.5 times the ion concentrations of a normal simulated body fluid. The irradiated PE substrates formed apatite on their surfaces, irrespective of the acceleration voltage, whereas unirradiated substrates did not form apatite. This is attributed to the formation of functional groups that are effective for apatite nucleation, such as COOH groups, on the substrate surface by the simultaneous use of O2 cluster and monomer ion beams. The apatite-forming ability of the irradiated PE substrates was improved greatly by a subsequent CaCl2 solution treatment. This suggests that Ca2+ ions introduced on the substrate surface by the CaCl2 solution treatment accelerated the apatite nucleation. It is concluded that apatite-forming ability can be induced on the surface of PE by the simultaneous use of O2 cluster and monomer ion beams. © 2007 Wiley Periodicals, Inc. J Biomed Mater Res, 2007 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text