give reference if you have any where ac impedance raw data has been plotted and circuit values are given in the table. but EIS fitting data has not been plotted.
the fitted plot only will give perfect shape & values with circuit
Most journal require fitting plot. Raw data is to hard to analyse. In Differential pulse voltametry for example is impossible to add raw data. Sometime we add 2 graphics in one figure. In impedance fitting plot is useful to measure the semicircle
It is not necessary, it depends on work. You can reference some studies.
Yes, it is essential, to verify the circuit and check for differences in the low/high frequency regime.
The most important point is to choose the right equivalent electric circuit and then, to show how good was the obtained fitting to it. You have to well know your system under study in order to present good and reliable EIS data.
In this paper of mine we did not show the fit, because we had a large number of data, but all the data were fit and the more important parameters for the discussion were presented in the text.
https://www.researchgate.net/publication/287968025_Multifunctional_Biosensors_Based_on_Peptide-Polyelectrolyte_Conjugates
Article Multifunctional Biosensors Based on Peptide-Polyelectrolyte Conjugates
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