# US 2010/0163429 A1 · Gas sensing material and gas sensor employing the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2010/0163429 A1 - Document ID: US20100163429A1 - Status: Published application - Kind: A1 - Application number: 12/477,876 - Filed: 2009-06-03 - Published: 2010-07-01 - Earliest claimed: 2008-12-31 - Assignees: Industrial Technology Research Institute - Inventors: Kuo-Chuang Chiu; Ren-Der Jean; Jinn-Shing King; Ming-Tsung Hong; Shur-Fen Liu - Web page: https://patentgrep.com/patent/US20100163429A1 ## CPC - G01N 27/125: {Composition of the body, e.g. the composition of its sensitive layer} - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) ## Abstract Gas sensing material and gas sensor employing the same are provided. The gas sensing material includes an inorganic metal oxide and an organic polymer, wherein the organic polymer includes a repeat unit having the structure of wherein R1 and R2 are an independent alkyl group, alkoxy group, alkoxycarbonyl group, aryl group, heteroaryl group, or aliphatic group. ## Claims ### Claim 1 A gas sensing material, comprising: an inorganic metal oxide; and an organic polymer, wherein the organic polymer comprises a repeat unit having the structure of wherein R1 and R2 are an independent alkyl group, alkoxy group, alkoxycarbonyl group, aryl group, heteroaryl group, or aliphatic group. ### Claim 2 (depends on 1) The gas sensing material as claimed in claim 1, wherein the inorganic metal oxide comprises SnO2, ZnO, LaFeO3, IN2O3, WO3, Ag2O, or combinations thereof. ### Claim 3 (depends on 1) The gas sensing material as claimed in claim 1, wherein the gas sensing material is able to sense carbon monoxide. ### Claim 4 (depends on 1) The gas sensing material as claimed in claim 1, wherein the gas sensing material is able to sense a desired gas at a temperature of not more than 250° C. ### Claim 5 (depends on 1) The gas sensing material as claimed in claim 1, wherein the gas sensing material is able to perform gas desorption at a temperature of not more than 250° C. ### Claim 6 (depends on 1) The gas sensing material as claimed in claim 1, wherein the gas sensing material is prepared at a temperature of not more than 400° C. ### Claim 7 (depends on 1) The gas sensing material as claimed in claim 1, wherein the inorganic metal oxide is present in an amount of 20-60 parts by weight, and the organic polymer is present in an amount of 40-80 parts by weight, based on the 100 parts by weight of the inorganic metal oxide and the organic polymer. ### Claim 8 (depends on 1) The gas sensing material as claimed in claim 1, wherein the gas sensing material further comprises a polymer dispersant. ### Claim 9 (depends on 8) The gas sensing material as claimed in claim 8, wherein the polymer dispersant comprises polyester, polyimide, or copolymer thereof. ### Claim 10 (depends on 8) The gas sensing material as claimed in claim 8, wherein the polymer dispersant is present in an amount of 10-30 parts by weight, based on the 100 parts by weight of the inorganic metal oxide and the organic polymer. ### Claim 11 (depends on 1) The gas sensing material as claimed in claim 1, wherein the electric resistance, electric capacity, or inductance of the gas sensing material is varied after adsorption of a desired gas. ### Claim 12 A gas sensor, comprising: a substrate; two separated electrodes disposed on the substrate; and a gas sensing film disposed on the substrate and contacting the two separated electrodes simultaneously, wherein the gas sensing film comprises: an inorganic metal oxide; and an organic polymer, wherein the organic polymer comprises a repeat unit having the structure of wherein R1 and R2 are an independent alkyl group, alkoxy group, alkoxycarbonyl group, aryl group, heteroaryl group, or aliphatic group. ### Claim 13 (depends on 12) The gas sensor as claimed in claim 12, wherein the substrate is a plastic substrate. ### Claim 14 (depends on 12) The gas sensor as claimed in claim 12, wherein the two separated electrodes are independently made of Pt, Au, Ag, or alloys thereof. ### Claim 15 (depends on 12) The gas sensor as claimed in claim 12, wherein the inorganic metal oxide comprises SnO2, ZnO, LaFeO3, IN2O3, WO3, Ag2O, or combinations thereof. ### Claim 16 (depends on 12) The gas sensor as claimed in claim 12, wherein the gas sensing film is able to sense carbon monoxide. ### Claim 17 (depends on 12) The gas sensor as claimed in claim 12, wherein the gas sensing film is able to sense a desired gas at a temperature of not more than 250° C. ### Claim 18 (depends on 12) The gas sensor as claimed in claim 12, wherein the gas sensing film is able to perform gas desorption at a temperature of not more than 250° C. ### Claim 19 (depends on 12) The gas sensor as claimed in claim 12, wherein the gas sensing film is formed at a temperature of not more than 400° C. ### Claim 20 (depends on 12) The gas sensor as claimed in claim 12, wherein the inorganic metal oxide is present in an amount of 20-60 parts by weight, and the organic polymer is present in an amount of 40-80 parts by weight, based on the 100 parts by weight of the inorganic metal oxide and the organic polymer. ### Claim 21 (depends on 12) The gas sensor as claimed in claim 12, wherein the gas sensing film further comprises a polymer dispersant. ### Claim 22 (depends on 21) The gas sensor as claimed in claim 21, wherein the polymer dispersant comprises polyester, polyimide, or copolymer thereof. ### Claim 23 (depends on 21) The gas sensor as claimed in claim 21, wherein the polymer dispersant is present in an amount of 10-30 parts by weight, based on the 100 parts by weight of the inorganic metal oxide and the organic polymer. ### Claim 24 (depends on 12) The gas sensor as claimed in claim 12, wherein the electric resistance, electric capacity, or inductance of gas sensing film is varied after adsorption of a desired gas.