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Surface composition and surface energy of Teflon treated by metal plasma immersion ion implantation |
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| Authors: | Ricky K.Y. Fu G.J. Wan Paul K. Chu Y.X. Huang S.Q. Yang |
| Affiliation: | a Department of Physics and Materials Science, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong b State Key Laboratory of Welding Production Technology, Harbin Institute of Technology, Harbin, China c School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China |
| Abstract: | Plasma immersion ion implantation using a metal vacuum vapor arc (MEVVA) or cathodic arc source was used to modify the fluorine-based polymer, Teflon. Several transition metal ions such as Co, Ni, Cu were introduced into plasma and implanted into the Teflon surface. The chemical composition of the modified surface was determined by Rutherford backscattering spectrometry (RBS) and X-ray photoelectron spectroscopy (XPS). The metals were found to be distributed several nanometers from the surface and XPS results showed the formation of metallic carbides and fluorides on the surface. Contact angle measurement results demonstrate the favorable change in the wettability from being hydrophobic to hydrophilic. Our study shows that the increase of the surface energy is due to the change of the surface interaction properties after metal plasma implantation. |
| Keywords: | X-ray photoelectron spectroscopy Wetting Polycrystalline surfaces Surface energy Ion implantation |
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