Multisin and Dynamic Impedance Spectroscopy
Prof. Andrzej Lasia
Emeritus Professor at the Chemistry Department, Université de Sherbrooke, Québec, Canada
In EIS studies ac perturbation is applied consecutively one frequency at a time. Applying all the frequencies simultaneously and analyzing the signals by FFT allows to shorten duration of the experiment, however it increases the noise. This method also allows to carry out the EIS measurements during the potential sweep voltammetry and detect hidden dynamic negative resistances.
Short biography:
Professor Andrzej Lasia is an Emeritus Professor from the Chemistry Department of Sherbrooke University in Quebec, Canada. He is best known for his renowned book in impedance spectroscopy "Electrochemical Impedance Spectroscopy and Its Applications". He obtained his Ph.D from the University of Warsaw, Poland, 1975 and worked at Université de Sherbrooke since 1983. During his active and then retired years his main focus was on impedance spectroscopy in connection with electrocatalysis, hydrogen adsorption, absorption and evolution, water electrolysis, porous electrodes, corrosion of metals, etc. as well as the theoretical background of impedance spectroscopy and relaxation techniques. In total, he has 162 scientific publications, over 145 conference presentations and has been a guest speaker 91 times.