Oriented bottom-up growth of armchair graphene nanoribbons on germanium
AssigneeWisconsin Alumni Research Foundation
InventorsMichael Scott Arnold, Robert Michael Jacobberger
Life of this patent
Estimating the term…
Abstract
Graphene nanoribbon arrays, methods of growing graphene nanoribbon arrays and electronic and photonic devices incorporating the graphene nanoribbon arrays are provided. The graphene nanoribbons in the arrays are formed using a scalable, bottom-up, chemical vapor deposition (CVD) technique in which the (001) facet of the germanium is used to orient the graphene nanoribbon crystals along the [110] directions of the germanium.
Claims16
A graphene nanoribbon array comprising:
- a germanium substrate having a (001) facet;
- and
- a plurality of graphene nanoribbons on the (001) facet of the germanium substrate;
- wherein the graphene nanoribbons have aspect ratios of at least 5 and the average aspect ratio of the graphene nanoribbons in the plurality of graphene nanoribbons is at least 20;
- and
- further wherein the graphene nanoribbons have the armchair crystallographic direction of graphene running all the way along their long axes and an armchair configuration along their edges, and further wherein the long axes of the graphene nanoribbons are oriented along a [110] direction of the germanium.
(canceled)
A method of growing graphene nanoribbons, the method comprising growing graphene on the (001) facet of a germanium substrate via chemical vapor deposition from a mixture of methane gas and hydrogen gas, wherein the partial pressures of the methane and hydrogen are selected to result in the growth of a plurality of graphene nanoribbons having their long axis oriented along the [110] directions of the germanium substrate and having the armchair crystallographic direction of graphene running parallel to the long nanoribbon edges, wherein the graphene nanoribbons are grown with an average aspect ratio of at least 12.
Dependencies are inferred from the claim text.