Methods of supporting a graphene sheet disposed on a frame support
This disclosure provides systems, methods, and apparatus related to graphene. In one aspect, a method includes submerging a frame support in an etching solution that is contained in a container. A growth substrate, a graphene sheet disposed on the growth substrate, and a primary support disposed on the graphene sheet is placed on a surface of the etching solution. The growth substrate is dissolved in the etching solution to leave the graphene sheet and the primary support floating on a surface of the etching solution. The etching solution in the container is replaced with a washing solution. The washing solution is removed from the container so that the graphene sheet becomes disposed on the frame support.
1. A method comprising:
(a) submerging a frame support in an etching solution that is contained in a container;
(b) placing a growth substrate, a graphene sheet disposed on the growth substrate, and a primary support disposed on the graphene sheet on a surface of the etching solution;
(c) dissolving the growth substrate in the etching solution to leave the graphene sheet and the primary support floating on a surface of the etching solution;
(d) replacing the etching solution in the container with a washing solution; and
(e) removing the washing solution from the container so that the graphene sheet becomes disposed on the frame support.
2. The method of claim 1 , wherein the frame support comprises an electron microscopy grid.
3. The method of claim 1 , wherein the frame support comprises an electron microscopy grid, and wherein no other materials are disposed on the electron microscopy grid.
4. The method of claim 1 , wherein the growth substrate comprises a copper foil.
5. The method of claim 1 , wherein the graphene sheet comprises a single layer of graphene.
6. The method of claim 1 , wherein the graphene sheet comprises a multiple layers of graphene.
7. The method of claim 1 , wherein the primary support comprises a holey carbon film.
8. The method of claim 1 , wherein the primary support comprises a sheet of gold with holes defined therein.
9. The method of claim 1 , wherein the etching solution comprises a copper etching solution.
10. The method of claim 1 , wherein the etching solution comprises ammonium persulfate dissolved in water.
11. The method of claim 1 , further comprising:
adding an alcohol to the washing solution during operation (e).
12. The method of claim 11 , wherein the alcohol comprises isopropyl alcohol.
13. The method of claim 1 , wherein the washing solution comprises water.
14. The method of claim 1 , further comprising:
after operation (e), removing the washing solution from the frame support, the graphene sheet, and the primary support.
15. A method comprising:
(a) submerging a frame support in an etching solution that is contained in a container, the etching solution comprising a copper etching solution;
(b) placing a growth substrate, a graphene sheet disposed on the growth substrate, and a primary support disposed on the graphene sheet on a surface of the etching solution, the growth substrate comprising a copper foil;
(c) dissolving the growth substrate in the etching solution to leave the graphene sheet and the primary support floating on a surface of the etching solution;
(d) replacing the etching solution in the container with a washing solution, the washing solution comprising water; and
(e) removing the washing solution from the container so that the graphene sheet becomes disposed on the frame support.
16. The method of claim 15 , further comprising:
adding an alcohol to the washing solution during operation (e).
17. The method of claim 15 , wherein the frame support comprises an electron microscopy grid.
18. The method of claim 15 , wherein the graphene sheet comprises a single layer of graphene.
19. The method of claim 15 , wherein the primary support comprises a holey carbon film.