| Summary: | 碩士 === 國立臺灣科技大學 === 材料科學與工程系 === 101 === Thin films metallic glasses (TFMG) have demonstrated tremendous potential due to their high strength, high toughness, good corrosion, abrasion resistances, smooth surface and thermal plasticity. These materials are thus potentially useful for the medical application such as antibacterial coatings. In this work, Zr-based (Zr53Cu33Al9Ta5) and Cu-based (Cu48Zr42Ti4Al6) TFMGs was deposited on Si wafer and AISI 304 stainless steel via magnetron sputtering. We then evaluated the microstructure, surface roughness, amorphization and antibacterial properties of the thin films.
As compared to 48.8° on the bare Si wafer, the water contact angles of 119.5° and 106.6° for Zr- and Cu-based TFMGs, respectively, reveal the hydrophobic characteristic of the coated surfaces. The adhesion of bacteria to biomaterial surfaces is the main reason for implant-associated infection. Bacteria adhered to material surfaces for an extended period forms a biofilm. In this study, TFMG deposited has provided smooth surfaces to which bacteria would not easily attach so the mechanisms for resistance effects of TFMG to bacterial adherence are proposed. Furthermore, the bacterial adhesion of E. coli and S. aureus to both Zr-based and Cu-based TFMGs is hindered to different extents.
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