Wearable sensor and method for manufacturing same

1. A wearable sensor, comprising:

a fiber;

a self-assembled monolayer including a functional group and being formed on at least one surface of the fiber;

a carbon nanotube layer formed on the self-assembled monolayer by adsorbing a plurality of carbon nanotubes on the self-assembled monolayer; and

an electrode electrically connected to the carbon nanotube layer,

wherein a hydroxyl group (—OH) is formed on the surface of the carbon nanotube, and

wherein the hydroxyl group (—OH) of the carbon nanotube and the functional group of the self-assembled monolayer make an ionic bond.

2. The wearable sensor according to claim 1 , further comprising a ductile protective layer which is coated on the carbon nanotube layer.

3. The wearable sensor according to claim 1 , wherein the self-assembled monolayer comprises:

a root unit combined with the at least one surface of the fiber; and

a functional group unit comprising the functional group and being connected with the root unit.

4. The wearable sensor according to claim 1 , wherein the functional group is at least one selected from the group consisting of an amine group (—NH), an amino group (—NH2), a thiol group (—SH), a carboxyl group (—COOH), a formyl group (—CHO), a cyanato group (—OCN), a silanol group (Si—OH), a phosphine group (—PO2H2), a phosphone group (—PO3H2), a sulfone group (—SO3H), and an epoxy group.

5. The wearable sensor according to claim 1 , wherein the fiber is formed using an elastic material.

6. The wearable sensor according to claim 1 , wherein the wearable sensor senses a resistance change of the carbon nanotube layer according to a deformation of the fiber.

7. A method for manufacturing a wearable sensor, the method comprising:

forming a self-assembled monolayer comprising a functional group on a fiber;

acid treating carbon nanotubes;

dispersing the carbon nanotubes in a dispersing medium; and

forming a carbon nanotube layer on the self-assembled monolayer by providing on at least one surface of the fiber a dispersion solution in which the carbon nanotubes are dispersed in the dispersing medium,

wherein, in the acid treating the carbon nanotubes, at least a portion of carbon bonds is removed from the surface of the carbon nanotubes,

the method further comprises forming a hydroxyl group (—OH) on the at least one surface of the carbon nanotube from which the carbon bond is removed.

8. The method for manufacturing a wearable sensor according to claim 7 , wherein, in the forming the carbon nanotube layer, the carbon nanotubes are vacuum-adsorbed on the self-assembled monolayer while filtering the dispersion solution, by forming a vacuum pressure on another surface of the fiber.

9. The method for manufacturing a wearable sensor according to claim 7 , wherein, in the forming the self-assembled monolayer, the fiber is immersed in a surface treatment solution comprising the functional group, for forming the self-assembled monolayer on the at least one surface of the fiber.

10. The method for manufacturing a wearable sensor according to claim 7 , further comprising forming a ductile protective layer which is coated on the carbon nanotube layer.

11. The method for manufacturing a wearable sensor according to claim 7 , wherein, in the forming the carbon nanotube layer, the carbon nanotube layer is continuously formed on the self-assembled monolayer while transporting the fiber in a crossing direction to the providing direction of the dispersion solution.

12. The method for manufacturing a wearable sensor according to claim 7 , wherein, in the forming the carbon nanotube layer, the functional group of the self-assembled monolayer and the hydroxyl group (—OH) of the carbon nanotube make an ionic bond.