Electromagnetic radiation absorbers and modulators comprising polyaniline
A method of providing electronic shielding comprising providing a layer of a polyaniline composition on the object to be shielded, whereby the entrance and egress of electromagnetic radiation is prevented. Also presented herein is a method of changing the absorption by a polyaniline composition of electromagnetic radiation by modifying the chemical structure and crystallinographic order of the polyaniline composition, wherein said composition comprises a composition of the formula <IMAGE> where y can be equal to or greater than zero, and R1 and R2 are independently selected from the group consisting of -H, -OCH3, -F, -Cl, -Br, -I, -NR32, -NHCOR3, -OH, -O, -SR3, -OR3, -OCOR3, -NO2, -COOH, -COOR3, -R3SO3H, -COR3, -CHO, and -CN, where R3 is a C1 to C8 alkyl, aryl, or aralkyl group.