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 region is chemically functionalized with a first dopant species and the second defined region is chemically functionalized with a second dopant species, and
wherein the first defined region has a border aligned with a crystal direction of the graphene substrate.
2. The device of claim 1 , wherein the first and second defined regions form a semiconducting junction.
3. 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.
4. The device of claim 1 , wherein the graphene substrate comprises a single layer.
5. The device of claim 1 , wherein the graphene substrate comprises multiple layers.
6. The device of claim 1 , wherein the first defined region does not include a edge of the graphene substrate.
7. The device of claim 6 , wherein the second defined region does not include a edge of the graphene substrate.
8. 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.
9. The device of claim 8 , wherein the third defined region is chemically functionalized with a third dopant species.
10. The device of claim 1 , wherein the graphene substrate is disposed on a base substrate.
11. The device of claim 10 , wherein the base substrate is graphite.
12. The device of claim 10 , wherein the base substrate is a crystal containing at least one element other than carbon.
13. The device of claim 1 , wherein the first dopant species and the second dopant species functionalize opposing surfaces of the graphene substrate.
14. The device of claim 1 , wherein the first dopant species includes a plurality of intermixed dopant subspecies.
15. The device of claim 14 , wherein the second dopant species includes the same plurality of intermixed dopant subspecies as the first dopant species.
16. 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.
17. The device of claim 16 , wherein the difference in the electronic property is a function of a property of the free moiety.
18. The device of claim 1 , wherein the first dopant species varies in attachment pattern within the first defined region.
19. The device of claim 1 , wherein the first dopant species varies in concentration within the first defined region.
20. 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 defined region has a border aligned with a crystal direction of the graphene substrate and is remote from any edge of the graphene substrate.