Synthesis and electrochemical properties of various dimensional polyaniline micro/nanostructures: Microdisks, nanospheres and nanofibers

► Different PANI micro/nanostructures were synthesized by changing the pH values of reaction system. ► PANI micro/nanostructures exhibit good electrochemical behavior. ► PVP and pH values play significant roles in formation of PANI micro/nanostructures.