The deposited MIP and NIP films were imaged using SEM microscope to prove their successful deposition on the carbon paper electrode (Figure , S10, Supplementary materials). MIP (Figure , Supplementary materials), NIP (Figure , Supplementary materials) as well as pristine PPy (Figure , Supplementary materials) form lacy frost-like structures over carbon fibers (Figure and S9b, Supplementary materials). After extraction with carbonate buffer, MIP (Figure , Supplementary materials) and NIP (Figure , Supplementary materials) films morphology appeared more compact. SEM images of lower magnification (Figure , Supplementary materials) and optical camera image (Figure , Supplementary materials) indicate that whole surface of carbon fibers was coated with grainy polymer structures after MIP and NIP films deposition. MIP film coating on these fibers was not affected by extraction in 0.1 M carbonate buffer of pH = 9.1 (Figure , S10, Supplementary materials).