Graphene composition, method of forming a graphene composition and sensor system comprising a graphene composition
A method of forming a composition includes oxidation of graphene oxide to form holey graphene oxide having defects therein and reduction of the holey graphene oxide.
1. A method of forming a composition, comprising:
oxidation of graphene oxide sheets to form holey graphene oxide sheets having holes in the basal plane thereof; and
reduction of the holey graphene oxide sheets to provide a network of interconnected graphene nanoribbons.
2. The method of claim 1 wherein the oxidation of graphene oxide sheets comprises enzymatic oxidation of graphene oxide sheets.
3. The method of claim 2 wherein enzymatic oxidation occurs in the presence of a peroxidase and a substrate for the peroxidase.
4. The method of claim 3 wherein the peroxidase is at least one of horseradish peroxidase, myeloperoxidase, cytochrome c peroxidase, cytochrome P450, eosinophil peroxidase, glutathione peroxidase, lactoperoxidase, thyroid peroxidase, deiodinase, lignin peroxidase, dehaloperoxidase or manganese peroxidase.
5. The method of claim 4 wherein the substrate includes hydrogen peroxide and organic hydroperoxide substrates.
6. The method of claim 3 wherein reduction occurs via reaction with a reducing agent or via heating.
7. The method of claim 6 wherein the reducing agent comprises hydrazine hydrate.
8. The method of claim 2 wherein properties of the network of interconnected graphene nanoribbons are controlled via reactions conditions.
9. The method of claim 1 wherein the oxidation of graphene oxide sheets is carried out in a temperature range of approximately 20° C. to 90° C.
10. The method of claim 1 wherein the oxidation of graphene oxide sheets is carried out in a temperature range of approximately 20° C. to 40° C.
11. The method of claim 1 wherein the oxidation of graphene oxide sheets is carried out at a pH in the range of approximately 3.0 to 10.0.