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US 9,040,397 B2Granted
Method of making graphene layers, and articles made thereby
AssigneeLGS Innovations LLC
InventorAshok J. Maliakal
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Abstract
There is provided a method for forming a graphene layer. The method includes forming an article that comprises a carbon-containing self-assembled monolayer (SAM). A layer of nickel is deposited on the SAM. The article is heated in a reducing atmosphere and coolded. The heating and cooling steps are carried out so as to convert the SAM to a graphene layer.
Claims10
A method, comprising:
- forming an article that comprises a carbon-containing self-assembled monolayer (SAM);
- depositing a layer of nickel on the SAM;
- heating the article in a reducing atmosphere;
- and
- cooling the article, wherein
- the heating and cooling steps are carried out so as to convert the SAM to a graphene layer,
- the forming step comprises depositing at least one amphiphilic compound on a substrate including silicon dioxide,
- the amphiphilic compound comprises a tail group and a head group,
- the tail group comprises a hydrocarbon moiety including at least one aliphatic chain, and
- the head group comprises at least one species which is a thiol, a disulfide, a xanthate, a thiocarbamate, a carboxylic acid, a silyl ester, or a phosphonate, and the head group comprises a moiety that adheres to the substrate.
7 more elements
A method, comprising:
- forming an article that comprises a carbon-containing self-assembled monolayer (SAM);
- depositing a layer of nickel on the SAM;
- heating the article in a reducing atmosphere;
- and
- cooling the article, wherein
- the heating and cooling steps are carried out so as to convert the SAM to a graphene layer,
- the forming step comprises depositing a mixture of at least two amphiphilic compounds on a substrate,
- the amphiphilic compound comprises a tail group and a head group,
- the head group comprises a moiety that adheres to the substrate,
- the tail group comprises a hydrocarbon moiety,
- at least one of said amphiphilic compounds is an alkyl surfactant, and
- at least one of said amphiphilic compounds comprises a p-type or n-type dopant element selected so that the heating and cooling steps result in the formation of a graphene layer having, respectively, p-type or n-type semiconductive behavior.
9 more elements
Dependencies are inferred from the claim text.