a composition of matter for the recording medium of nanometer scale thermo - mechanical information storage devices and a nanometer scale thermo - mechanical information storage device . the composition includes : one or more polyaryletherketone copolymers , each of the one or more polyaryletherketone copolymers comprising a first monomer including an aryl ether ketone and a second monomer including an aryl ether ketone and a first phenylethynyl moiety , each of the one or more polyaryletherketone copolymers having two terminal ends , each terminal end having a phenylethynyl moiety the same as or different from the first phenylethynyl moiety . the one or more polyaryletherketone copolymers are thermally cured and the resulting cross - linked polyaryletherketone resin used as the recording layer in an atomic force data storage device .