Graphene nanoribbons, graphene nanoplatelets and mixtures thereof and methods of synthesis

• US 10,640,384 B2
• Filed: 08/22/2018
• Issued: 05/05/2020
• Est. Priority Date: 08/22/2017
• Status: Active Grant

• Current Assignee: NTherma Corporation
• Original Assignee: NTherma Corporation
• Inventors: Nguyen, Cattien V.
• Primary Examiner(s): McCracken, Daniel C.
• Application Number:
  US16/108,676
• Publication Number:
  US 20190062165A1
• Time in Patent Office: 622 Days
• CPC Class Codes: C01B 2204/06 Graphene nanoribbons
• CPC Class Codes: C01B 2204/30 Purity
• CPC Class Codes: C01B 32/162 characterised by catalysts
• CPC Class Codes: C01B 32/168 After-treatment
• CPC Class Codes: C01B 32/178 Opening; Filling
• CPC Class Codes: C01B 32/184 Preparation
• CPC Class Codes: C01P 2006/80 Compositional purity

Abstract

Provided herein are graphene nanoribbons with high structural uniformity and low levels of impurities and methods of synthesis thereof. Also provided herein are graphene nanoplatelets of superior structural uniformity and low levels of impurities and methods of synthesis thereof. Further provided herein are mixtures of graphene nanoribbons and graphene nanoplatelets of good structural uniformity and low levels of impurities and methods of synthesis thereof. The method includes, for example, the steps of depositing catalyst on a constantly moving substrate, forming carbon nanotubes on the substrate, separating carbon nanotubes from the substrate, collecting the carbon nanotubes from the surface where the substrate moves continuously and sequentially through the depositing, forming, separating and collecting steps. Further processing steps convert the synthesized carbon nanotubes to graphene nanoribbons, graphene nanoplatelets and mixtures thereof.

Claims

1. Graphene nanoribbons of greater than 99% purity and a I_2D/I_G ratio of 0.6.

2. The graphene nanoribbons of claim 1, wherein the purity is greater than 99.5%.

3. The graphene nanoribbons of claim 1, wherein the length of the graphene nanoribbon is about 50 μ

m.

4. The graphene nanoribbons of claim 1, wherein the length of the graphene nanoribbon is about 100 μ

m.

5. The graphene nanoribbons of claim 1, wherein the length of the graphene nanoribbon is about 150 μ

m.

6. The graphene nanoribbons of claim 1, wherein the length of the graphene nanoribbon is about 200 μ

m.