Nanohardness, corrosion and protein adsorption properties of CuAlO 2 films deposited on 316L stainless steel for biomedical applications
Journal
Applied Surface Science
Journal Volume
289
Pages
455-461
Date Issued
2014
Author(s)
Abstract
This study preliminarily assesses the biomedical applications of CuAlO 2 coatings according to nanoindentation, electrochemical, and protein adsorption tests. Nanoindentation results revealed that the surface hardness of 316L stainless steel increased markedly after coating with CuAlO 2 films. Electrochemical tests of corrosion potential, breakdown potential, and corrosion current density showed that the corrosion resistance properties of 316L stainless steel are considerably improved by CuAlO 2 coatings. Bicinchoninic acid (BCA) protein assay results revealed that the protein adsorption behavior of 316L stainless steel did not exhibit notable differences with or without CuAlO 2 coatings. A CuAlO 2 coating of 100 nm thickness improved the surface nanohardness and corrosion resistance ability of 316L stainless steel. CuAlO 2 is a potential candidate for biomaterial coating applications, particularly for surface modification of fine, delicate implants. ? 2013 Elsevier B.V.
Subjects
Electrochemical
Nanoindentation
Protein adsorption
Surface modification
Type
journal article