“…The N + /N ratio of PPy100 was close to 50%, suggesting that the half-oxidized PPy was obtained in the presence of PSS with the molecular weight of 1.0 × 10 6 g/mol [ 6 , 11 , 35 ]. These results can be explained as follows: (1) The larger PPy particles are more densely packed, improving the connectivity between the conductive regions in PPy:PSS [ 11 , 12 , 15 , 19 , 28 , 29 , 31 , 32 , 33 ]; (2) Due to the increased inter-particle connectivity, more electrons can be delocalized within PPy:PSS structures [ 11 , 12 , 15 , 19 , 28 , 29 , 31 , 32 , 33 ]; (3) The PSS with a higher molecular weight further suppresses the undesirable α,α’-linkages that disrupt the delocalization of π-electrons inside the PPy chains [ 1 , 3 , 4 , 5 , 6 , 21 ]; (4) Accordingly, the effective delocalization of π-electrons in the PPy structure is due to the increased molecular weight of PSS and enables the improved protonation level of PPy:PSS.…”