Doped graphene electronic materials
View Patent ↗A graphene substrate is doped with one or more functional groups to form an electronic device.
1. An electronic device, comprising:
a graphene substrate including a first defined region and a second defined region differing in at least one electronic property from the first defined region, wherein the first defined region is chemically functionalized with a first dopant species and the second defined region is chemically functionalized with a second dopant species.
2. The device of claim 1 , wherein the at least one electronic property includes at least one of Fermi level, band structure, carrier populations, mobility, tunneling behavior, and conductive character.
3. The device of claim 1 , wherein the difference in the at least one electronic property is a consequence of the functionalization of the first and second defined regions.
4. The device of claim 1 , wherein the first and second defined regions form a semiconducting junction.
5. The device of claim 1 , further comprising a first interconnect electrically connected to the first defined region and a second interconnect electrically connected to the second defined region.
6. The device of claim 1 , wherein the first defined region and the second defined region are adjacent.
7. The device of claim 1 , further comprising a third defined region differing in at least one electronic property from each of the first defined region and the second defined region.
8. The device of claim 1 , wherein the first dopant species and the second dopant species functionalize opposing surfaces of the graphene substrate.
9. The device of claim 1 , wherein the second dopant species differs from the first dopant species.
10. The device of claim 1 , wherein the first dopant species and the second dopant species differ in concentration.
11. The device of claim 1 , wherein the first dopant species and the second dopant species differ in attachment pattern to the graphene substrate.
12. The device of claim 1 , wherein the first dopant species is intercalated in the graphene substrate.
13. The device of claim 1 , wherein the first dopant species varies in attachment pattern within the first defined region.
14. The device of claim 1 , wherein the first dopant species varies in concentration within the first defined region.
15. The device of claim 1 , wherein the second defined region surrounds the first defined region.
16. The device of claim 1 , wherein the first dopant species and the second dopant species functionalize a common surface of the graphene substrate.
17. The device of claim 1 , wherein the first dopant species is adsorbed on the graphene substrate.
18. The device of claim 1 , wherein the first dopant species is chemically bound to the graphene substrate.
19. The device of claim 1 , wherein the first defined region does not include an edge of the graphene substrate.
20. The device of claim 19 , wherein the second defined region does not include an edge of the graphene substrate.
21. The device of claim 1 , wherein the first dopant species includes a plurality of intermixed dopant subspecies.
22. The device of claim 21 , wherein the second dopant species includes the same plurality of intermixed dopant subspecies as the first dopant species.
23. The device of claim 21 , wherein at least one member of the plurality of intermixed dopant subspecies varies in concentration within the first defined region.
24. The device of claim 1 , wherein the first dopant species includes a first bound moiety affixed to the graphene substrate and a first free moiety removably attached to the first bound moiety.
25. The device of claim 24 , wherein the difference in the electronic property is a function of a property of the free moiety.
26. The device of claim 24 , wherein the second dopant species includes a second bound moiety affixed to the graphene substrate and a second free moiety removably attached to the second bound moiety.
27. The device of claim 26 , wherein the first bound moiety and the second bound moiety have the same composition.
28. An electronic device, comprising:
a graphene substrate including a first defined region and a second defined region differing in at least one electronic property from the first defined region, wherein the first region is chemically functionalized with a first dopant species, and wherein the first region is remote from any edge of the graphene substrate.
29. The device of claim 28 , wherein the second defined region is chemically functionalized with a second dopant species.
30. The device of claim 29 , wherein the first dopant species and the second dopant species functionalize opposing surfaces of the graphene substrate.
31. The device of claim 28 , wherein the difference in the at least one electronic property is a consequence of the functionalization of the first defined region.
32. The device of claim 28 , wherein the first and second defined regions form a semiconducting junction.
33. The device of claim 28 , wherein the second defined region does not include an edge of the graphene substrate.
34. The device of claim 28 , wherein the first dopant species includes a first bound moiety affixed to the graphene substrate and a first free moiety removably attached to the first bound moiety.
35. An electronic circuit, comprising:
a graphene substrate including:
a first device including a first defined region of the graphene substrate and a second defined region of the graphene substrate differing in at least one first electronic property from the first defined region, wherein the first region is chemically functionalized with a first dopant species; and
a second device including a third defined region of the graphene substrate and a fourth defined region of the graphene substrate differing in at least one second electronic property from the third defined region, wherein the third region is chemically functionalized with a second dopant species.
36. The circuit of claim 35 , wherein the first and second devices have substantially the same electronic character.
37. The circuit of claim 35 , further comprising a fifth defined region of the graphene substrate that functions as an interconnect between the first and second devices.
38. The circuit of claim 35 , wherein the first and second defined regions form a semiconducting junction.
39. The circuit of claim 35 , wherein the first dopant species and the second dopant species functionalize opposing surfaces of the graphene substrate.
40. The circuit of claim 35 , wherein the first device and the second device are positioned on opposing surfaces of the graphene substrate.
41. The circuit of claim 35 , wherein the second dopant species differs from the first dopant species.