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Synthesis, Structure And Characterization Of Silver Doped Diamond Like Carbon Thin Films

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Synthesis, Structure And Characterization Of Silver Doped Diamond Like Carbon Thin Films

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dc.contributor.author Hazarika, Pankaj Jyoti en_US
dc.date.accessioned 2008-04-22T02:41:12Z
dc.date.available 2008-04-22T02:41:12Z
dc.date.issued 2008-04-22T02:41:12Z
dc.date.submitted December 2007 en_US
dc.identifier.other DISS-1927 en_US
dc.identifier.uri http://hdl.handle.net/10106/738
dc.description.abstract Diamond like carbon (DLC) films have gained grounds in the biomedical field as an inert, biocompatible, low friction and wear resistant coating and are widely used in heart valves, coronary artery stents, dental implants, knee prosthesis and other vascular devices. In addition, Ag nanoparticles/films can prevent the formation of biofilm on biomedical implants by degrading the metabolic activities like permeability and respiration and also impair DNA replicability. Thus, Ag-doped DLC (Ag-DLC) can serve as a multifunctional bio coating combining desirable antibacterial and physical/ mechanical characteristics. In the present study, Ag-DLC films were synthesized utilizing a hybrid Plasma CVD and Magnetron sputtering process in a CH4/Ar glow discharge. Nanocomposite films containing Ag nanoparticles in an amorphous DLC matrix with various amounts of Ag were synthesized and characterized by Transmission Electron Microscope (TEM), Fourier Transform Infrared Spectroscopy (FTIR) and X-ray Photoelectron Spectroscopy (XPS). Tribological experiments were performed to assess the frictional behavior and wear resistance of the Ag-DLC films as a function of Ag content. Anodic polarization experiments were conducted to characterize the electrochemical behavior of the Ag-DLC films. TEM results revealed that Ag nanoparticles of 4-7 nm in size were uniformly distributed in an amorphous DLC matrix. Microhardness of DLC films exhibited a hardness of 22 GPa and it gradually decreased with increasing Ag content in the films. Wear rate of DLC film was 1.9 x 10-8 mm3/Nm and it increased to 8 x 10-7 mm3/Nm for Ag-DLC (5% Ag) film. Electrochemical behavior experiments showed that Ag-DLC films exhibited an inert behavior compared to the pure silver. en_US
dc.description.sponsorship Meletis, Efstathios en_US
dc.language.iso EN en_US
dc.publisher Materials Science & Engineering en_US
dc.title Synthesis, Structure And Characterization Of Silver Doped Diamond Like Carbon Thin Films en_US
dc.type M.S.Mat.S.E. en_US
dc.contributor.committeeChair Meletis, Efstathios en_US
dc.degree.department Materials Science & Engineering en_US
dc.degree.discipline Materials Science & Engineering en_US
dc.degree.grantor University of Texas at Arlington en_US
dc.degree.level masters en_US
dc.degree.name M.S.Mat.S.E. en_US
dc.identifier.externalLink https://www.uta.edu/ra/real/editprofile.php?onlyview=1&pid=283
dc.identifier.externalLinkDescription Link to Research Profiles

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