Elastic device using carbon nanotube film

An elastic device, comprising:

• a first elastic supporter;
• a second elastic supporter spaced from the first elastic supporter;
• and
• a carbon nanotube film, a first side of the carbon nanotube film being fixed on the first elastic supporter, a second side of the carbon nanotube film, opposite to the first side, being fixed on the second elastic supporter, and a middle portion of the carbon nanotube film being suspended between the first elastic supporter and the second elastic supporter, the carbon nanotube film being entirely made of carbon nanotubes and comprising:
• a plurality of first carbon nanotubes orientated primarily along a first direction;
• and
• a plurality of second carbon nanotubes, at least one portion of each of the plurality of second carbon nanotubes being in contact with at least two adjacent of the first carbon nanotubes, wherein the plurality of second carbon nanotubes are uniformly dispersed and randomly oriented, and a mass ratio between the plurality of second carbon nanotubes and the carbon nanotube film is in a range from about 14% to about 33% so that the carbon nanotube film is elastically deformable to at least 300% along a second direction that is substantially perpendicular to the first direction.