TRANSIENT-BEHAVIOR AT PLANAR MICROELECTRODES - DIFFUSION CURRENT AT THE RING ELECTRODE - A COMPARISON OF EXPERIMENT WITH THEORY

In the preceding paper we described the transient behavior of diffusion current in response to a potential step at ring microelectrodes, as predicted from numerical calculations using the recently introduced integral equation method. This method is applicable to rings of arbitrary thickness and diameter and describes accurately the current over several orders of magnitude in time. In this report we describe results of transient measurements of diffusion current at ring electrodes of various dimensions and compare the experimentally observed transients with those predicted from the integral equation method. © 1990.