Patent ID: 8236269

Claim:
A rigid random coil that is formed by using carbon or a carbon nanotube, wherein the rigid random coil is bent through permanent deformation, the bending of the rigid random coil being defined by an average bending ratio D b of 0.1 to 0.8, as represented by the following equation (4): D b = 〈 R 2 〉 L 2 ( 4 ) wherein R is an end-to-end distance vector, and L is a contour length, the contour length being an end-to-end vector distance measured when said rigid random coil is contoured in the shape of a straight line, wherein the contour length is 10 times or more than the diameter of the rigid random coil, and wherein the rigid random coil has a weight average molecular weight of 1×10 8 to 9×10 8 g/mole.