title: Nanocomposite coatings on biomedical grade stainless steel for improved corrosion resistance and biocompatibility.
abstract: The 316 L stainless steel is one of the most commonly available commercial implant materials with a few limitations in its ease of biocompatibility and long-standing performance. Hence, porous TiO(2)/ZrO(2) nanocomposite coated over 316 L stainless steels was studied for their enhanced performance in terms of its biocompatibility and corrosion resistance, following a sol-gel process via dip-coating technique. The surface composition and porosity texture was studied to be uniform on the substrate. Biocompatibility studies on the TiO(2)/ZrO(2) nanocomposite coatings were investigated by placing the coated substrate in a simulated body fluid (SBF). The immersion procedure resulted in the complete coverage of the TiO(2)/ZrO(2) nanocomposite (coated on the surface of 316 L stainless steel) with the growth of a one-dimensional (1D) rod-like carbonate-containing apatite. The TiO(2)/ZrO(2) nanocomposite coated specimens showed a higher corrosion resistance in the SBF solution with an enhanced biocompatibility, surpassing the performance of the pure oxide coatings. The cell viability of TiO(2)/ZrO(2) nanocomposite coated implant surface was examined under human dermal fibroblasts culture, and it was observed that the composite coating enhances the proliferation through effective cellular attachment compared to pristine 316 L SS surface.
authors.affiliation: Structural Metals Center, National Institute for Material Science (NIMS), 1-2-1 Sengen, 305-0047 Tsukuba, Ibaraki, Japan.
authors.forename: Srinivasan
authors.initials: S
authors.lastname: Nagarajan
authors.forename: Marimuthu
authors.initials: M
authors.lastname: Mohana
authors.forename: Pitchaimuthu
authors.initials: P
authors.lastname: Sudhagar
authors.forename: Vedarajan
authors.initials: V
authors.lastname: Raman
authors.forename: Toshiyasu
authors.initials: T
authors.lastname: Nishimura
authors.forename: Sanghyo
authors.initials: S
authors.lastname: Kim
authors.forename: Yong Soo
authors.initials: YS
authors.lastname: Kang
authors.forename: Nallaiyan
authors.initials: N
authors.lastname: Rajendran