Interconnected corrugated carbon-based network

Patent metadata

Field	Value
Publication number	US-2020232960-A1
Application number	US-202016791504-A
Country	US
Kind code	A1
Filing date	Feb 14, 2020
Priority date	Dec 21, 2011
Publication date	Jul 23, 2020
Grant date	—

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 patterned interconnected corrugated carbon-based network, comprising:
a) receiving a substrate having a carbon-based oxide film; b) generating a light beam having a power density sufficient to reduce portions of the carbon-based oxide film to a plurality of expanded and interconnected carbon layers that are electrically conductive; and c) directing the light beam across the carbon-based oxide film in a predetermined pattern via a computerized control system.

2 . The method of claim 1 , further including adjusting the power density of the light beam to tune electrical conductivity of the plurality of expanded and interconnected carbon layers produced when the carbon-based oxide film is exposed to the light beam.

3 . 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 around 20 megaohms per square to around 80 ohms per square.

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

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

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

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

8 . The method of claim 1 , wherein the light beam has a power range from around about 5 mW to around about 350 mW.

9 . The method of claim 1 , further including loading the substrate into an automated laser patterning system before generating the light beam having the power density sufficient to reduce portions of the carbon-based oxide film to the interconnected corrugated carbon-based network.

10 . The method of claim 1 , wherein exposing the carbon-based oxide film to the light beam to form the predetermined pattern of interconnected corrugated carbon-based networks within the carbon-based oxide film is repeated over predetermined portions of the predetermined pattern to increase a graphite to carbon-based oxide ratio.

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 around about three minutes.

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

15 . The method of claim 1 , wherein the plurality of expanded and interconnected carbon layers yields an electrical conductivity that is greater than around about 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 around about 7 μm to around about 8 μm

17 . The method of claim 1 , wherein the plurality of expanded and interconnected carbon layers have a C/O ratio that ranges from around about 100:1 to 25:1.

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

19 . The method of claim 1 , wherein the predetermined pattern defines a scaffold for direct growth of nanoparticles.

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

Assignees

• Univ California

Inventors

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

Classifications

• Y02A50/20

  Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters · CPC title

• C01B32/23

  Oxidation · CPC title

• B32B2457/12

  Photovoltaic modules · CPC title

• B32B2457/08

  PCBs, i.e. printed circuit boards · CPC title

• B32B9/041

  of metal · CPC title