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Gas Sensors Based on Conducting Polymers

View Article: PubMed Central

ABSTRACT

The gas sensors fabricated by using conducting polymers such as polyaniline (PAni), polypyrrole (PPy) and poly (3,4-ethylenedioxythiophene) (PEDOT) as the active layers have been reviewed. This review discusses the sensing mechanism and configurations of the sensors. The factors that affect the performances of the gas sensors are also addressed. The disadvantages of the sensors and a brief prospect in this research field are discussed at the end of the review.

No MeSH data available.


Configuration of chemresistor.
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f3-sensors-07-00267: Configuration of chemresistor.

Mentions: Chemiresistors are the most common type of sensors [63, 71, 118, 122-127]. They can be fabricated through a cheap and convenient process [128]. A chemiresistor is a resistor, whose electric resistance is sensitive to the chemical environment. Chemiresistor consists of one or several pairs of electrodes and a layer of conducting polymer in contacting with the electrodes, as illustrated in Figure 3. The electrical resistance change of the sensing material is measured as the output, so a simple ohmmeter is enough to collect the data. Usually, a constant current or potential is applied on the sensor, and the measuring signal is potential or current change, respectively. To improve the performance, interdigitated electrode is widely used [25, 30, 44, 129], and a typical one was shown in Figure 4. This type of sensor is simple but efficient.


Gas Sensors Based on Conducting Polymers
Configuration of chemresistor.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3756721&req=5

f3-sensors-07-00267: Configuration of chemresistor.
Mentions: Chemiresistors are the most common type of sensors [63, 71, 118, 122-127]. They can be fabricated through a cheap and convenient process [128]. A chemiresistor is a resistor, whose electric resistance is sensitive to the chemical environment. Chemiresistor consists of one or several pairs of electrodes and a layer of conducting polymer in contacting with the electrodes, as illustrated in Figure 3. The electrical resistance change of the sensing material is measured as the output, so a simple ohmmeter is enough to collect the data. Usually, a constant current or potential is applied on the sensor, and the measuring signal is potential or current change, respectively. To improve the performance, interdigitated electrode is widely used [25, 30, 44, 129], and a typical one was shown in Figure 4. This type of sensor is simple but efficient.

View Article: PubMed Central

ABSTRACT

The gas sensors fabricated by using conducting polymers such as polyaniline (PAni), polypyrrole (PPy) and poly (3,4-ethylenedioxythiophene) (PEDOT) as the active layers have been reviewed. This review discusses the sensing mechanism and configurations of the sensors. The factors that affect the performances of the gas sensors are also addressed. The disadvantages of the sensors and a brief prospect in this research field are discussed at the end of the review.

No MeSH data available.