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 chemically functionalized with a first dopant species,
wherein the first dopant species has a concentration that varies across the first defined region, and
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.
2. The device of claim 1 , wherein the concentration of the first dopant species varies stepwise across the first defined region.
3. The device of claim 1 , wherein the device has at least one electronic property that varies across the first defined region.
4. The device of claim 3 , wherein the at least one electronic property includes at least one of Fermi level, band structure, carrier populations, mobility, tunneling behavior, and conductive character.
5. The device of claim 3 , wherein the variation in the at least one electronic property is a consequence of the functionalization of the first defined region.
6. The device of claim 1 , wherein the first defined region is part of a component including a diode, a transistor, a switch, a resistor, a capacitor, an inductor, a sensor, and an interconnect.
7. The device of claim 1 , further comprising a first interconnect electrically connected to the first defined region.
8. The device of claim 1 , wherein the graphene substrate comprises a single layer.
9. The device of claim 1 , wherein the graphene substrate comprises multiple layers.
10. The device of claim 1 , wherein the first defined region does not include a edge of the graphene substrate.
11. The device of claim 1 , wherein the graphene substrate is disposed on a base substrate.
12. The device of claim 11 , wherein the base substrate is graphite.
13. The device of claim 11 , wherein the base substrate is a crystal containing at least one element other than carbon.
14. The device of claim 1 , wherein the first dopant species includes at least one of an amine, an imine, an organic free radical, an aromatic molecule, nitrogen, boron, gold, bismuth, antimony, bromine, iodine, a diazonium salt, hydrogen, and an alkyl group.
15. The device of claim 1 , wherein the first dopant species varies in attachment pattern to the graphene substrate.
16. The device of claim 1 , wherein the first dopant species includes a plurality of intermixed dopant subspecies.
17. The device of claim 16 , wherein at least one member of the plurality of intermixed dopant subspecies varies in concentration within the first defined region.
18. The device of claim 1 , wherein the first dopant species is adsorbed on the graphene substrate.
19. The device of claim 18 , wherein the first dopant species is chemisorbed on the graphene substrate.
20. The device of claim 1 , wherein the first dopant species is chemically bound to the graphene substrate.
21. The device of claim 1 , wherein the first dopant species is intercalated in the graphene substrate.