ALEXANDRIA, Va., Sept. 24 -- United States Patent no. 12,741,872, issued on Sept. 22, was assigned to Wisconsin Alumni Research Foundation (Madison, Wis.).

"Self-assembling rod-coil copolymers for carbon nanotube sorting and the fabrication of carbon nanotube films" was invented by Padma Gopalan (Madison, Wis.), Michael Scott Arnold (Middleton, Wis.), Stephanie Oliveras Santos (Madison, Wis.) and Songying Li (Madison, Wis.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Methods of sorting carbon nanotubes and methods of forming films of aligned carbon nanotubes using rod-coil copolymers are provided. The rod-coil copolymers have a tri-block or di-block architecture and include a conjugated polymer segment ("r...