Surface modification of CoCr alloys by electrochemical reduction of diazonium salts.

ABSTRACT: Tailoring the surface chemistry of CoCr alloys is of tremendous interest in many biomedical applications. In this work, we show that CoCr can be modified by diazonium electrografting provided the surface is not homogeneously covered with an oxide layer. Cyclic voltammetry (CV) and X-ray photoelectron spectroscopy (XPS) show the electrografting of a poly(aminophenylene) (PAP) layer on CoCr when treated at a reductive potential (CoCr_{-0.5 V}), whereas no PAP film was formed on CoCr_OCP and CoCr_{1 V}, treated at open circuit and anodic potentials respectively. Based on XPS results, we attributed the electrografting to the formation of carbide bonds between PAP and the inhomogeneous thin oxide layer of CoCr_{-0.5 V}. We then show an example of application of

SUBMITTER: Mezour MA 

PROVIDER: S-EPMC9081548 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature