fig3

Figure 3. (A) Photos of Flexible PEDOT:PSS bulky papers; (B) S(2p) XPS spectra of PEDOT:PSS bulky papers: pristine, treated with EG, and treated with FA. Reproduced with permission from Ref^[23]. Copyright^© 2015. American Chemical Society. EG: Ethylene glycol; PEDOT:PSS: poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonic acid).