Method for transferring two-dimensional nanomaterials
The present invention relates to a method for transferring two-dimensional nanomaterials. The method comprises: (S 1 ) providing a first substrate with a two-dimensional nanomaterial layer on a surface of the first substrate and a carbon nanotube composite film comprising a carbon nanotube film structure and a nanomaterial layer stacked with each other; (S 2 ) covering the two-dimensional nanomaterial layer with the carbon nanotube composite film, wherein the carbon nanotube film structure of the carbon nanotube composite film is in contact with the two-dimensional nanomaterial layer; (S 3 ) obtaining a composite structure comprising the two-dimensional nanomaterial layer and the carbon nanotube composite film by removing the first substrate with a corrosion solution; (S 4 ) placing the composite structure on a surface of a cleaning solution for cleaning; (S 5 ) picking up the composite structure from the cleaning solution by contacting the target substrate with the two-dimensional nanomaterial layer; and (S 6 ) removing the carbon nanotube composite film.
1. A method for transferring two-dimensional nanomaterials comprising:
(S 1 ) providing a first substrate with a two-dimensional nanomaterial layer on a surface of the first substrate and a carbon nanotube composite film comprising a carbon nanotube film structure and a nanomaterial layer stacked with each other;
(S 2 ) covering the two-dimensional nanomaterial layer with the carbon nanotube composite film, wherein the carbon nanotube film structure of the carbon nanotube composite film is in contact with the two-dimensional nanomaterial layer;
(S 3 ) obtaining a composite structure comprising the two-dimensional nanomaterial layer and the carbon nanotube composite film by removing the first substrate with a corrosion solution;
(S 4 ) cleaning the composite structure by placing the composite structure on a surface of a cleaning solution;
(S 5 ) picking up the composite structure from the cleaning solution with a target substrate by contacting the target substrate with the two-dimensional nanomaterial layer; and
(S 6 ) removing the carbon nanotube composite film from the composite structure.
2. The method of claim 1 , wherein a material of the two-dimensional nanomaterial layer is a graphene, a boron nitride, or a molybdenum sulfide.
3. The method of claim 1 , wherein the carbon nanotube composite film is porous and comprises micropores.
4. The method of claim 1 , wherein the carbon nanotube composite film is a integrated structure.
5. The method of claim 1 , wherein the carbon nanotube composite film is a free-standing structure.
6. The method of claim 1 , wherein the nanomaterial layer is continuously formed on a surface of each carbon nanotube in the carbon nanotube film structure to form a continuous layer structure.
7. The method of claim 1 , wherein the nanomaterial layer is formed at an intersection of adjacent carbon nanotubes in the carbon nanotube film structure.
8. The method of claim 1 , wherein a thickness of the nanomaterial layer ranges from 10 nanometers to 100 nanometers.
9. The method of claim 1 , wherein a material of the nanomaterial layer is inert metal, metal oxide, semiconductor oxide or nitride.
10. The method of claim 1 , wherein the carbon nanotube film structure is a free-standing structure, and the carbon nanotube film structure comprises at least two carbon nanotube films stacked with each other.
11. The method of claim 10 , wherein each of the carbon nanotube films comprises a plurality of carbon nanotubes joined end-to-end by van der Waals force therebetween and extending approximately along a same extending direction.
12. The method of claim 11 , wherein the extending directions of the plurality of carbon nanotubes are substantially parallel to a surface of the carbon nanotube film.
13. The method of claim 11 , wherein angles between the extending directions of the carbon nanotubes in adjacent carbon nanotube films range from about 0 degrees to 90 degrees (0°≤α≤90°).
14. The method of claim 1 , wherein the corrosion solution is an acid solution, an alkali solution, or a salt solution.
15. The method of claim 1 , wherein the cleaning solution is an acid solution or an ultra-pure water.
16. The method of claim 1 , wherein the step (S 5 ) comprises: inserting the target substrate into the cleaning solution; and lifting the target substrate to pick up the composite structure.
17. The method of claim 16 , wherein during the process of lifting the target substrate, a surface of the target substrate is in contact with and adheres to the two-dimensional nanomaterial layer.
18. The method of claim 1 , wherein the step (S 5 ) further comprises drying the target substrate and the composite film composite structure after picking up the composite structure with the target substrate.
19. The method of claim 1 , wherein the step (S 6 ) comprises: clamping a side of the carbon nanotube composite film with a pair of tweezers; and tearing off the carbon nanotube composite film from the composite structure with the pair of tweezers.