GAS SENSOR

• US 20200132618A1
• Filed: 07/18/2019
• Published: 04/30/2020
• Est. Priority Date: 10/26/2018
• Status: Active Grant

• Current Assignee: National Chiao Tung University (Government of The Republic of China)
• Original Assignee: National Chiao Tung University (Government of The Republic of China)
• Inventors: ZAN, Hsiao-Wen, MENG, Hsin-Fei, LIN, Yu-Chi, YU, Shang-Yu, TUNG, Ting-Wei, WU, Yi-Chu, MAO, Yu-Nung
• Granted Patent: US 11,499,937 B2
• Time in Patent Office: Days
• CPC Class Codes: G01N 27/125 Composition of the body, e.g. the composition of its sensitive layer
• CPC Class Codes: G01N 27/128 Microapparatus
• CPC Class Codes: G01N 27/4075 Composition or fabrication of the electrodes and coatings thereon, e.g. catalysts
• CPC Class Codes: G01N 33/0027 concerning the detector
• CPC Class Codes: G01N 33/0075 for multiple spatially distributed sensors, e.g. for environmental monitoring transmission systems for measured values G08C

Abstract

A gas sensor includes a first electrode, a gas detecting layer disposed on the first electrode, and an electric-conduction enhanced electrode unit being electrically connected to the first electrode and the gas detecting layer. The electric-conduction enhanced electrode unit includes an electric-conduction enhancing layer and a second electrode electrically connected to the electric-conduction enhancing layer. The electric-conduction enhancing layer is electrically connected to the gas detecting layer and is made of an electrically conductive organic material.

Claims

1. A gas sensor comprising:

a first electrode;

a gas detecting layer disposed on said first electrode;

an electric-conduction enhanced electrode unit being electrically connected to said first electrode and said gas detecting layer and including an electric-conduction enhancing layer and a second electrode electrically connected to said electric-conduction enhancing layer, said electric-conduction enhancing layer being electrically connected to said gas detecting layer and being made of an electrically conductive organic material; and

an insulating unit disposed on said first electrode for partially separating said first electrode from said gas detecting layer and said electric-conduction enhanced electrode unit.

2. The gas sensor as claimed in claim 1, wherein:

said insulating unit includes a plurality of insulating members disposed on said first electrode, any two adjacent ones of said insulating members being formed with a first gap therebetween so as to expose said first electrode from said first gap; and

said gas detecting layer and said electric-conduction enhancing layer extend into said first gaps to be electrically connected with said first electrode.

3. The gas sensor as claimed in claim 2, wherein each of said first gaps is surrounded by two corresponding adjacent ones of said insulating members.

4. The gas sensor as claimed in claim 2, wherein said first gaps are in spatial communication with each other to separate said insulating members from each other.

5. The gas sensor as claimed in claim 2, wherein said gas detecting layer covers said insulating members and extends into said first gaps to cover said first electrode exposed therefrom, said electric-conduction enhancing layer covering said gas detecting layer.

6. The gas sensor as claimed in claim 5, wherein said second electrode of said electric-conduction enhanced electrode unit includes a plurality of spaced-apart electrode portions, any two adjacent ones of said electrode portions being formed with a second gap therebetween, each of said electrode portions being disposed between a corresponding one of said insulating members and said gas detecting layer, each of said second gaps being in spatial communication with a corresponding one of said first gaps such that said gas detecting layer and said electric-conduction enhancing layer extend into said corresponding first gap through said second gap.

7. The gas sensor as claimed in claim 6, wherein each of said second gaps has a width ranging from 1 micrometer to 200 micrometers.

8. The gas sensor as claimed in claim 5, wherein said second electrode of said electric-conduction enhanced electrode unit includes a plurality of spaced-apart electrode portions, each of said electrode portions being disposed on said electric-conduction enhancing layer and oppositely corresponding in position to a corresponding one of said insulating members.

9. The gas sensor as claimed in claim 2, wherein said electric-conduction enhancing layer covers said insulating members and extends into said first gaps to cover said first electrode exposed therefrom, said gas detecting layer covering said electric-conduction enhancing layer.

10. The gas sensor as claimed in claim 9, wherein said second electrode of said electric-conduction enhanced electrode unit includes a plurality of spaced-apart electrode portions, each of said electrode portions being disposed on said gas detecting layer oppositely of said first electrode and in a corresponding one of said first gaps.

11. The gas sensor as claimed in claim 1, wherein the electrically conductive organic material is selected from the group consisting of poly(3,4-ethylenedioxythiophene), polystyrene sulfonate, polypyrrole, polythiophene, polyphenylene sulfide, polyaniline, polyacetylene, poly (p-phenylene vinylene) , and combinations thereof.

12. A gas sensor, comprising

a first electrode;

a gas detecting layer disposed on said first electrode;

an electric-conduction enhanced electrode unit being electrically connected to said first electrode and said gas detecting layer and including an electric-conduction enhancing layer and a second electrode electrically connected to said electric-conduction enhancing layer, said electric-conduction enhancing layer being electrically connected to said gas detecting layer and being made of an electrically conductive organic material,

wherein said second electrode of said electric-conduction enhanced electrode unit includes a plurality of spaced-apart electrode portions formed on said gas detecting layer and interposed between said electric-conduction enhancing layer and said gas detecting layer, any two adjacent ones of said electrode portions being formed with a second gap therebetween to expose said gas detecting layer from said second gap; and

wherein said electric-conduction enhancing layer extends into said second gaps to be in contact with said gas detecting layer.

13. The gas sensor as claimed in claim 12, wherein each of said second gaps has a width ranging from 1 micrometer to 200 micrometers.

14. The gas sensor as claimed in claim 12, wherein the electrically conductive organic material is selected from the group consisting of poly(3,4-ethylenedioxythiophene), polystyrene sulfonate, polypyrrole, polythiophene, polyphenylene sulfide, polyaniline, polyacetylene, poly(p-phenylene vinylene), and combinations thereof.