GAS SENSOR AND METHOD OF MAKING
First Claim
Patent Images
1. A gas sensor, comprising:
- a gas sensing layer comprising WO3-δ
, wherein 0.35≧
δ
>
0, and comprising a dopant selected from the group consisting of Re, Ni, Cr, V, W, and a combination thereof; and
at least one electrode positioned adjacent to layer of titanium and a response modification layer of a material selected from the group consisting of Ti, Ni, Cr, V, W, Re and a combination thereof, the at least one electrode being in communication with the gas sensing layer;
wherein the gas sensing layer is capable of detecting at least one gas selected from the group consisting of NO, NO2, SOx, O2, H2O and NH3.
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Abstract
A gas sensor is disclosed. The gas sensor includes a gas sensing layer including doped oxygen deficient tungsten oxide and a dopant selected from the group consisting of Re, Ni, Cr, V, W, and a combination thereof, at least one electrode positioned within a layer of titanium, and a response modification layer. The at least one electrode is in communication with the gas sensing layer and the gas sensing layer is capable of detecting at least one gas selected from the group consisting of NO, NO2, SOx O2, H2O, and NH3. A method of fabricating the gas sensor is also disclosed.
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Citations
26 Claims
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1. A gas sensor, comprising:
-
a gas sensing layer comprising WO3-δ
, wherein 0.35≧
δ
>
0, and comprising a dopant selected from the group consisting of Re, Ni, Cr, V, W, and a combination thereof; andat least one electrode positioned adjacent to layer of titanium and a response modification layer of a material selected from the group consisting of Ti, Ni, Cr, V, W, Re and a combination thereof, the at least one electrode being in communication with the gas sensing layer; wherein the gas sensing layer is capable of detecting at least one gas selected from the group consisting of NO, NO2, SOx, O2, H2O and NH3. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. An automobile having a system for gas sensing, comprising:
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an exhaust system to transport gases; and a gas sensor, comprising; a gas sensing layer comprising WO3-δ
, wherein 0.35≧
δ
>
0, and comprising a dopant selected from the group consisting of Re, Ni, Cr, V, W, and a combination thereof;at least one electrode positioned within a layer of titanium and a response modification layer comprising a material selected from the group consisting of Ti, Ni, Cr, V, W, Re and a combination thereof, the at least one electrode being in communication with the gas sensing layer, and wherein the gas sensing layer is capable of detecting at least one gas selected from the group consisting of NO, NO2, SOx, O2, H2O, and NH3.
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26. A method for making a gas sensor, the method comprising the steps of:
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providing a substrate; disposing a heating layer adjacent to the substrate layer; disposing a first glass layer adjacent to the heating layer; disposing a temperature sensing layer adjacent to the first glass layer; disposing a second glass layer adjacent to the temperature sensing layer; disposing at least one electrode adjacent to the second glass layer, disposing a titanium layer adjacent to the at least one electrode; disposing a response modification layer adjacent to the titanium layer; and disposing a gas sensing layer comprising WO3-δ
, wherein 0.35≧
δ
>
0, and comprising a dopant selected from the group consisting of Re, Ni, Cr, V, W or a combination thereof, adjacent to the response modification layer.
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Specification