GAS SENSOR

PROBLEM TO BE SOLVED: To enhance the thermal stability of a gas sensor which uses a conductive polymer membrane. SOLUTION: Two comb-shaped electrodes 3, 3 are formed on a glass substrate 1, and a conductive polymer membrane which is composed of poly(3'-n-octyl-2,2'; 5',2"-terthio...

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Bibliographic Details
Main Authors AOYAMA YOSHIHIRO, YOSHII MITSUYOSHI, KUYAMA HIROKI, AKAMARU HISAMITSU, KITA JUNICHI
Format Patent
LanguageEnglish
Published 03.03.2000
Edition7
Subjects
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
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Summary:PROBLEM TO BE SOLVED: To enhance the thermal stability of a gas sensor which uses a conductive polymer membrane. SOLUTION: Two comb-shaped electrodes 3, 3 are formed on a glass substrate 1, and a conductive polymer membrane which is composed of poly(3'-n-octyl-2,2'; 5',2"-terthiophene) is formed on the surface of the electrodes 3, 3 as a sensitive membrane 7. The conductive polymer membrane is doped with FeCl3 as a dopant. Since side chains exist every two residual groups in the poly(3'-n-octyl-2,2'; 5',2"-terthiphene), a spatial margin in which the dopant exists is obtained. In addition, since the side chains are situated regularly as compared with poly(3'-n- octyl-2,2'-bithiophene), the random property of the distribution of the dopant is reduced. When the poly(3'-n-octyl-2,2'; 5',2"-terthiphene) is used for the sensitive membrane, the thermal stability of a gas sensor is enhanced.
Bibliography:Application Number: JP19980163849