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- W2087879967 abstract "Cobalt–chromium (Co–Cr) alloys have been extensively used for medical implants because of their excellent mechanical properties, corrosion resistance, and biocompatibility. This first time study reports the formation and stability of self-assembled monolayers (SAMs) on a Co–Cr–W–Ni alloy. SAMs of octadecyltrichlorosilanes (OTS) were coated on sputtered Co–Cr–W–Ni alloy thin film and bulk Co–Cr–W–Ni alloy. OTS SAM coated alloy specimens were characterized using contact angle goniometry, Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and atomic force microscopy (AFM). Contact angle analysis and FTIR suggested that ordered monolayers were coated on both sputtered and bulk alloy. XPS suggested the selective dissolution of cobalt from the alloy during the formation of OTS SAM. The bonding between the alloy and the OTS SAM was mainly attributed to Si–O–Cr and Si–O–W covalent bonds and a smaller contribution from Si–O–Co bonds. AFM images showed the distribution of islands of monolayers coated on the alloy. The height of monolayers in majority of the islands was closer to the theoretical length of fully extended OTS molecules oriented perpendicular to the surface. The stability of OTS SAM was investigated in tris-buffered saline at 37 °C for up to 7 days. Contact angle, FTIR, and XPS collectively confirmed that the monolayers remain ordered and bound to the alloy surface under this condition. This study shows that Co–Cr alloys can be surface modified using SAMs for potential biomedical applications." @default.
- W2087879967 created "2016-06-24" @default.
- W2087879967 creator A5026238212 @default.
- W2087879967 creator A5052004663 @default.
- W2087879967 creator A5052469404 @default.
- W2087879967 creator A5081506221 @default.
- W2087879967 date "2009-03-01" @default.
- W2087879967 modified "2023-10-14" @default.
- W2087879967 title "Surface modification of cobalt–chromium–tungsten–nickel alloy using octadecyltrichlorosilanes" @default.
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- W2087879967 doi "https://doi.org/10.1016/j.apsusc.2009.01.046" @default.
- W2087879967 hasPublicationYear "2009" @default.
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