Abstract: A metal-carbon nanotube composite is provided which includes a carbon nanotube, a magnetic material, and a metal and in which the carbon nanotube is bound to the magnetic material through a binding intervenor and the carbon nanotube is dispersed in the metal by binding the magnetic material to the metal. A preparing method of a metal-carbon nanotube composite is provided, the method including: a step of binding a carbon nanotube to a magnetic material through a binding intervenor; and a step of dispersing the carbon nanotube in a metal by binding the magnetic material to the metal.

Abstract: A size sorting device for carbon nanotube agglomerate and a method for separating and collecting dispersed carbon nanotubes using the size sorting device are provided. The size sorting device and method for separation and collection may use a magnetic field for separating and collecting dispersed carbon nanotubes.

Abstract: A belt wearable by a person; a loop formed thereon for receiving an object of predetermined circumference; a flap is securable in a first relation to the belt and to the loop wherein the flap restricts the opening to confine an object of the predetermined circumference within the loop, and displaceable to a second relation to the belt and the loop wherein the opening is passable to allow removal an object of the predetermined circumference from the loop. A retractor is so coupled to the belt and to the flap as to hold the flap proximate the belt when the flap is in the second relation to the belt and to the loop. A retractor stretched between top and bottom edges of the belt. Elastic retractor. Ring coupling the retractor to the flap. Elastic ring. VELCRO® brand closure fastening flap to loop and retractor to belt.