Deconvolution in Potentiometric SECM

One of the main limitations of potentiometric scanning electrochemical microscopy (SECM) is the large RC time constant, and therefore long response time of the cell. A relatively long equilibration interval has to be allowed before sampling at each data acquisition point to reach equilibrium potential, and avoid image distortion. In this paper, we present a method to get high‐quality, low distortion images, without increasing scan time. The convolution function causing the distortion can be expressed from the response function of the potentiometric cell. A model system was studied with high scan rate, then the image was deconvoluted using the inverse of the potentiometric response function to calculate the equilibrium potential for each data acquisition point from the respective observed values.