Method for making blackbody radiation source

A method for making blackbody radiation source comprises:

• step (S11):
• providing a blackbody radiation cavity comprising an inner surface, a substrate, and a carbon nanotube array located on the substrate, wherein the carbon nanotube array comprises a plurality of carbon nanotubes comprising a root portion directly contacting with the substrate and a top portion away from the substrate;
• step (S12):
• coating a black lacquer layer on the inner surface of the blackbody radiation cavity;
• step (S13):
• applying a pressure on a surface of the carbon nanotube array to make the plurality of carbon nanotubes of the carbon nanotube array toppled over on a surface of the substrate and form a carbon nanotube paper comprising the plurality of carbon nanotubes, and the plurality of carbon nanotubes in the carbon nanotube paper being parallel to the surface of the substrate;
• step (S14):
• applying the carbon nanotube paper on the black lacquer layer, to make the carbon nanotube paper located between the substrate and the black lacquer layer;
• step (S15):
• peeling off the substrate to separate the carbon nanotube paper from the substrate and bond to the black lacquer layer;
• and
• step (S16):
• placing an adhesive tape on a surface of carbon nanotube paper away from the black lacquer layer;
• and peeling off the adhesive tape, to make the plurality of carbon nanotubes in the carbon nanotube paper vertically aligned form the carbon nanotube array under a force between the adhesive tape and the plurality of carbon nanotubes in the carbon nanotube paper and a force between the black lacquer layer and the plurality of carbon nanotubes in the carbon nanotube paper, the plurality of carbon nanotubes of the carbon nanotube array substantially perpendicular to the surface of the black lacquer layer, and the top portion of the plurality of carbon nanotubes of the carbon nanotube array directly connecting with the black lacquer layer.