Landon-Lane, LeathamMarshall, Aaron T.Harrington, David A.2020-01-272020-01-2720192019Landon-Lane, L., Marshall, A.T. & Harrington, D.A. (2019). EIS at carbon fiber cylindrical microelectrodes. Electrochemistry Communications, 109, 106566. https://doi.org/10.1016/j.elecom.2019.106566https://doi.org/10.1016/j.elecom.2019.106566http://hdl.handle.net/1828/11516The theoretical mass-transport impedance at cylindrical microelectrodes has been known for some time, but an experimental verification is given here for the first time, using carbon fiber electrodes taken from a commercial carbon felt. Nonlinear least-squares fitting of the impedance spectrum of a redox couple at the reversible potential enables accurate evaluation of a composite parameter containing the standard rate constant and mean diffusivity, without measuring the fiber diameter, length or area.enMass transport impedanceCylindrical diffusionCarbon fiberMicroelectrodeEISArticleDepartment of Chemistry