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Author Tanguy, J.
Sponsorship USDOE
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CHEMISTRY ♦ MATERIALS SCIENCE ♦ ORGANIC POLYMERS ♦ ELECTROCHEMICAL COATING ♦ POLYMERIZATION ♦ NICKEL ♦ CHROMIUM ♦ PLATINUM ♦ IMPEDANCE ♦ NITRILES ♦ ADSORPTION ♦ VINYL RADICALS ♦ ELECTROPOLYMERIZATION
Abstract Electrochemical Impedance Spectroscopy (E.I.S.) is widely employed in order to follow the growth of organic layers electropolymerized on metallic substrates in the cathodic or in the anodic process. This technique is used in combination with other electrochemical techniques such as: cyclic voltammetry, chronocoulometry, chronopotentiometry or chronoamperometry normally used for the polymerization process. In fact EIS measurements are inserted between two polymerization stages in order to follow {ital in} {ital situ} the progressive modification of the metallic electrode which leads to a progressive change of the impedance of the electrochemical cell. Moreover when using for the electropolymerization process an electrolytic solution able to swell the growing polymer, the coating layer remains {open_quote}{open_quote}transparent{close_quote}{close_quote} to the electrolyte. The change of the double layer capacitance on the electrode can be measured through the polymer layer and the density of the bonds formed between the surface and the polymer can be derived from those measurements. Some examples of cathodic polymerization of vinylic molecules are given showing how the polymerization process is influenced by the bonds formed on the metal. The accuracy of the measurements and the conditions of validity are discussed. {copyright} {ital 1996 American Institute of Physics.}
ISSN 0094243X
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-01-01
Publisher Place United States
Volume Number 354
Issue Number 1
Technical Publication No. CONF-950119-


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