Title:
GAS SENSOR AND INDUCTION MATERIAL FOR DETECTING GAS USING IT
Document Type and Number:
Japanese Patent JP3042994
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a gas sensor that utilizes an organic semiconductor at an induction part, has high sensitivity even at a room temperature, and reversibly adsorbs gas or degasses.
SOLUTION: A gas sensor is provided with an induction part 5 consisting of a perylene derivative cast film being formed on an electrode 4 and a conductivity measurement part 7 for measuring the conductivity of the induction part 5, detects the increase in the conductivity of the induction part 5 caused by the contact with gas to be tested at the conductive measurement part 7, and detects H2S or mercaptan in the gas to be tested based on the detection result. The induction part 5 is set to an N,N'-(2,6-dimethylphenyl)-3,4,9,10- perylenetetracarboxylic-diimide cast film. When the H2S touches the induction part 5, electrons move at the sensitive part 5, thus increasing the conductivity of the induction part 5 being used as an n-type semiconductor. Due to the presence of the H2S, sensitive reaction is made and a current value is increased. On the other hand, when the case film is returned in the air, the current value is decreased. In this manner, the cast film rapidly adsorbs gas or degasses and has a superior response property.
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Inventors:
Akihisa Kudo
Wang Fang Shirai
Takehiko Sakaguchi
Wang Fang Shirai
Takehiko Sakaguchi
Application Number:
JP31926797A
Publication Date:
May 22, 2000
Filing Date:
November 20, 1997
Export Citation:
Assignee:
Ishihara Sangyo Co., Ltd.
Wang Fang Shirai
Wang Fang Shirai
International Classes:
G01N27/12; (IPC1-7): G01N27/12
Domestic Patent References:
| JP6184467A | ||||
| JP4216449A | ||||
| JP4882895A | ||||
| JP4882893A | ||||
| JP4882894A | ||||
| JP4216450A | ||||
| JP64455A | ||||
| JP1274053A | ||||
| JP1274052A | ||||
| JP9159634A | ||||
| JP9257737A | ||||
| JP6506411A |
Attorney, Agent or Firm:
Takao Watanuki (1 outside)