a carbon nanotube / polymer composite is described . the carbon nanotube / polymer composite includes at least one polymer material layer and at least one carbon nanotube / polymer composite layer . the carbon nanotube / polymer layer includes a polymer material and a plurality of carbon nanotubes embedded in the polymer material , wherein the carbon nanotube / polymer layer includes a top surface and a bottom surface opposite to the top surface , at least one of the top surface and bottom surface contacts with the adjacent polymer material layer , and the carbon nanotubes respectively contact at least one respective adjacent carbon nanotube to thereby yield a network of contacting carbon nanotubes .