Laser-induced graphene sensors and methods of making and using same

Patent metadata

Field	Value
Publication number	US-12227420-B2
Application number	US-201917419231-A
Country	US
Kind code	B2
Filing date	Dec 30, 2019
Priority date	Dec 28, 2018
Publication date	Feb 18, 2025
Grant date	Feb 18, 2025

Abstract

Gas sensors having laser-induced graphene (LIG) and/or LIG composites, and methods of making and using gas sensors having LIG and/or LIG composites.

First claim

What is claimed is:

1. A gas sensor comprising laser-induced graphene (LIG), wherein the gas sensor is operable to sense a gas based on thermal conductivity changes.

2. The gas sensor of claim 1 , wherein the gas sensor is operable to sense a gas selected from a group consisting of argon, carbon dioxide, dinitrogen, air, dioxygen, helium, dihydrogen, and mixtures thereof.

3. The gas sensor of claim 1 , wherein the gas sensor is operable to sense a hydrocarbon gas, an ionic gas, or a dipolar gas.

4. The gas sensor of claim 1 , wherein the gas sensor is operable to sense a volatile organic compound.

5. The gas sensor of claim 1 , wherein the gas sensor comprises the LIG in a LIG composite.

6. The gas sensor of claim 1 , wherein the gas sensor has two patterned LIG electrodes with a less than 50 μm PI gap between the two patterned LIG electrodes.

7. The gas sensor of claim 1 , wherein the gas sensor has a patterned continuous LIG filament.

8. A method comprising forming a gas sensor comprising laser-induced graphene (LIG), wherein the gas sensor is operable to sense a gas based on thermal conductivity changes.

9. The method of claim 8 , wherein the gas sensor is the gas sensor comprises the LIG in a LIG composite.

10. The method of claim 8 , wherein the method further comprises patterning or laser-writing a laser-induced graphene wire between two electrodes.

11. A method comprising:
(a) selecting a gas sensor comprising laser-induced graphene (LIG), wherein the gas sensor is operable to sense a gas based on thermal conductivity changes; and
(b) utilizing the gas sensor to sense a gas or plasma, wherein utilizing the gas sensor to sense the gas or plasma based on thermal conductivity changes.

12. The method of claim 11 , wherein the gas sensor comprises the LIG in a LIG composite.

13. The method of claim 11 , wherein the gas sensor is utilized to sense a gas that is selected from a group consisting of argon, carbon dioxide, dinitrogen, air, dioxygen, helium, dihydrogen, and mixtures thereof.

14. The method of claim 11 , wherein the gas sensor is utilized to sense a hydrocarbon gas, an ionic gas, or a dipolar gas.

15. The method of claim 11 , wherein the gas sensor is utilized to sense a volatile organic compound.

16. The method of claim 11 , wherein the gas sensor is utilized to sense the plasma.

17. The method of claim 11 further comprising repeatedly cleaning the gas sensor by applying a voltage across the laser-induced graphene which heats the gas sensor to displace adsorbates.

18. The method of claim 11 , wherein the gas sensor is utilized to sense flue gas or flue gas mixtures.

Assignees

• B G Negev Technologies And Applications Ltd At Ben Gurion Univ
• Univ Rice William M
• B G Negev Tech And Application Ltd At Ben Gurion U Suniversity State Or Country

Inventors

• Tour James Mitchell
• Luong Duy X
• Yang Kaichun
• Arnusch Christopher John
• Singh Swatantra Pratap
• Thakur Amit Kumar
• Stanford Michael G
• Li John T
• Presutti Steven E

Classifications

• Y02E10/541

  CuInSe2 material PV cells · CPC title

• H10B63/00

  Resistance change memory devices, e.g. resistive RAM [ReRAM] devices · CPC title

• H01M4/625

  Carbon or graphite · CPC title

• H01M4/587

  for inserting or intercalating light metals · CPC title

• C01B32/184

  Preparation · CPC title