Interconnected corrugated carbon-based network

Patent metadata

Field	Value
Publication number	US-12153032-B2
Application number	US-202217872380-A
Country	US
Kind code	B2
Filing date	Jul 25, 2022
Priority date	Dec 21, 2011
Publication date	Nov 26, 2024
Grant date	Nov 26, 2024

Abstract

An interconnected corrugated carbon-based network comprising a plurality of expanded and interconnected carbon layers is disclosed. In one embodiment, each of the expanded and interconnected carbon layers is made up of at least one corrugated carbon sheet that is one atom thick. In another embodiment, each of the expanded and interconnected carbon layers is made up of a plurality of corrugated carbon sheets that are each one atom thick. The interconnected corrugated carbon-based network is characterized by a high surface area with highly tunable electrical conductivity and electrochemical properties.

First claim

What is claimed is:

1. A method of producing a material comprising patterned interconnected corrugated carbon-based network, comprising:
a. receiving a substrate having a carbon-based oxide film;
b. irradiating the carbon-based oxide film with a light beam to reduce and expand portions of the carbon-based oxide film, thereby forming the material comprising a plurality of expanded and interconnected carbon layers that are electrically conductive; and
c. selectively tuning the electrical conductivity of the material by one of:
i. increasing a gray-scale level of the light beam, wherein increasing the gray-scale level of the light beam decreases a sheet resistance of the material; or
ii. irradiating the carbon-based oxide film with the light beam two or more times, wherein each subsequent irradiation by the light beam decreases the sheet resistance of the material;
wherein an oxygen content of the material is less than 5%.

2. The method of claim 1 , wherein the light beam has a power of 5 mW to 350 mW.

3. The method of claim 1 , wherein the light beam has a frequency of 660 nm to 780 nm.

4. The method of claim 1 , wherein increasing the gray-scale level of the light beam decreases the sheet resistance of the material by 7 orders of magnitude.

5. The method of claim 1 , wherein the plurality of expanded and interconnected carbon layers has a sheet resistance that is tunable within a range of 20 megaohms per square to 80 ohms per square.

6. The method of claim 1 , wherein the carbon-based oxide film is a graphite oxide film.

7. The method of claim 6 , wherein irradiating the carbon-based oxide film with the light beam two or more times increases a carbon-to-oxygen ratio.

8. The method of claim 7 , wherein the plurality of expanded and interconnected carbon layers has a carbon-to-oxygen (C/O) ratio that ranges from 100:1 to 25:1.

9. The method of claim 1 , wherein the light beam is a laser beam.

10. The method of claim 1 , wherein a light beam emission ranges from near infrared to ultraviolet wavelengths.

11. The method of claim 1 , further including an initial step of drop-casting a carbon-based oxide solution onto the substrate.

12. The method of claim 1 , wherein the substrate is polyethylene terephthalate (PET).

13. The method of claim 1 , further including exposing the substrate with oxygen plasma for three minutes.

14. The method of claim 1 , wherein each of the expanded and interconnected carbon layers is a single corrugated carbon sheet.

15. The method of claim 1 , wherein the plurality of expanded and interconnected carbon layers yields an electrical conductivity that is greater than 1500 S/m.

16. The method of claim 1 , wherein a range of thickness of the plurality of expanded and interconnected carbon layers is from 7 μm to 8 μm.

17. The method of claim 1 , wherein a number of expanded and interconnected carbon layers in the plurality of expanded and interconnected carbon layers is greater than 100.

18. The method of claim 1 , wherein the material comprising patterned interconnected corrugated carbon-based network defines a scaffold for direct growth of nanoparticles.

19. The method of claim 18 , wherein the nanoparticles are platinum (Pt) nanoparticles.

Assignees

• Univ California

Inventors

• Strong Veronica
• El-Kady Maher F
• Kaner Richard B

Classifications

• G21K5/02

  having no beam-forming means · CPC title

• C04B2237/72

  Forming laminates or joined articles comprising at least two interlayers directly next to each other · CPC title

• C04B2237/592

  whereby the interlayer is not continuous, e.g. not the whole surface of the smallest substrate is covered by the interlayer · CPC title

• C04B2237/363

  Carbon · CPC title

• C04B2237/086

  Carbon interlayers · CPC title