Hot press induced formation of an ordered graphene and few layered graphene sheets

Patent metadata

Field	Value
Publication number	US-9969618-B2
Application number	US-201415035039-A
Country	US
Kind code	B2
Filing date	Nov 17, 2014
Priority date	Nov 15, 2013
Publication date	May 15, 2018
Grant date	May 15, 2018

Abstract

A method of making an ordered crystalline product includes hot pressing amorphous carbon at an elevated temperature and pressure to form an ordered crystalline product.

First claim

What is claimed is:

1. A method of making graphene, comprising:
hot pressing amorphous carbon:
at a pressure between about 10 MPa and about 40 MPa;
at a temperature between about 800° C. and about 1,300° C.; and
for a duration between about 5 minutes and about 10 hours, to form graphene.

2. The method of claim 1 , wherein the duration is between about 5 minutes and about 3 hours.

3. The method of claim 1 , wherein the duration is between about 5 minutes and about 60 minutes.

4. The method of claim 1 , wherein the duration is between about 1 hour and about 10 hours.

5. The method of claim 1 , wherein the duration is between about 1 hour and about 3 hours.

6. The method of claim 1 , wherein the ordered carbon product is formed on a non-planar substrate.

7. The method of claim 1 , further comprising depositing the amorphous carbon on to a substrate prior to hot pressing the amorphous materials.

8. The method of claim 7 , wherein the amorphous carbon is deposited by chemical vapor deposition.

9. The method of claim 7 , wherein the amorphous carbon is deposited by physical vapor deposition.

10. The method of claim 9 , wherein the amorphous carbon is deposited by sputtering.

11. The method of claim 9 , wherein the amorphous carbon is deposited by evaporation.

12. The method of claim 7 , wherein the amorphous carbon formed by carbonization of a polymeric material coated on the substrate.

13. The method of claim 12 , wherein the polymeric material is poly(methyl methacrylate), polydimethylsiloxane, poly(p-phenylene-1,3,4-oxadiazole), or polyimide.

Assignees

• Nat Univ Singapore

Inventors

• Lee Jonghak
• Özyilmaz Barbaros

Classifications

• B05D3/007

  After-treatment · CPC title

• C01B32/184

  Preparation · CPC title

• C30B29/02

  Elements · CPC title

• C01B32/05 Primary

  Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30 · CPC title

• C30B1/023

  from solids with amorphous structure · CPC title