TY - JOUR
AU - Thierry, D.
AB - A scanning capacitive probe (the Kelvin probe) is applied to studying metal/polymer contacts. Potential drop across the electrical double layer of oriented ionic dipoles at the metal/polymer interface was shown to mainly contribute to measured Volta potentials. Amino groups of epoxy coatings are protonated upon their interaction with hydroxylated metal surfaces; being positively charged, they reduce the Volta potential of the metals. Acid groups of alkyd coatings acquire a negative charge and increase the Volta potentials of the metals. Polyaniline (an electron-conducting polymer) accepts metal's electrons to its Fermi level, thus producing a Schottky barrier. In this case, the potential at the contact does not depend on the metal nature; it approaches the aniline intrinsic redox-potential.
TI - Studies in the Electrical Double Layer at Metal/Polymer Interfaces by Scanning Capacitive Probe
JO - Protection of Metals and Physical Chemistry of Surfaces
DO - 10.1023/A:1021995208966
DA - 2004-10-04
UR - https://www.deepdyve.com/lp/springer-journals/studies-in-the-electrical-double-layer-at-metal-polymer-interfaces-by-Veh6vz4Pk9
SP - 55
EP - 62
VL - 39
IS - 1
DP - DeepDyve
ER -