Abstract
AbstractWe present in this work a series of result obtained on the atmospherically oxidized copper‐acrylonitrile system, our aim being to follow the deposition, by grafting and growing, of electropolymerized polyacrylonitrile film. Combining analytical means of electrochemistry—XPS, UPS and infrared reflection adsorption spectroscopy (IRAS)—allows quite an accurate description of this phenomena.The film was deposited by the imposition of a linearly growing negative tension to the copper electrode dipped in an electroyltic solution containing acrylonitrile. The polarization is stopped at different potentials of the current‐potential characteristic. These potentials correspond to the formation steps of the interface. Thus we describe, successively, the nature of the initial states (atmospherically oxidized copper) and the final states (insulating and covered polyacrylonitrile thin film of 20–30 Å) in relation to the change in density of occupied electronic superficial states.The appearance of this insulating and covering film is expressed on the current‐potential characteristic by an inhibition peak, named and passivation peak.Moreover, the non‐stoichiometric character of the superficial copper oxide is identified and permits the use of a low electrochemical potential (before the oxide electroreduction potential) to graft the polymer onto non‐oxidized sites.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.