Flexible, conducting water-soluble polyaniline/V2O5 nanocomposites: (PAPSA)(x)V2O5, (PSA)(x)V2O5, and (PAPSAH)(x)V2O5 were prepared by simply mixing water soluble polyaniline, poly(aniline-co-N-(4-sulfophenyl)aniline) (PAPSA), poly(N-(4-sulfophenyl)ani li