The kinetics of contact noise of Naβ″ alumina

Abstract

The kinetics of interfacial chemical reaction noise at sodium amalgam, NaI in propylene carbonate, and aqueous NaNO3 contacts to Naβ″ alumina are examined by determining the time, temperature, and sodium ion concentration dependence of the noise. The rate constant for the reaction noise is smallest for the NaI propylene carbonate contacts, 2.0×10−4 s−1, increases with sodium concentration, and has a thermal activation energy of 0.5 eV. Contact noise is interpreted in terms of ionic shot noise at the interface during the buildup of the electric double layer.