Fig. 6From: Enhancement of Electrochromic Properties of Polyaniline Induced by Copper IonsXPS spectra of N 1 s spectrum for a PANI-0, b PANI-0.5, c PANI-1, d PANI-2, e PANI-3 porous films, and f the ratio of nitrogen species to total nitrogen content for N 1s spectrumBack to article page