Ion sensors based on organic transistors

Ion sensors based on organic transistors

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This chapter presents the ion sensors which convert the activity of an ion dissolved in a solution into an electrical potential. This type of sensors is well-known and they are widely used in analytical chemistry and biochemistry. The use of organic polymers as active part of the ion sensors has led to a new way of research in these sensors. The chapter is divided into two parts: pH sensors and general ion sensors. The two parts are further divided based on the type of organic semiconductor used in the device fabrication: P3MT, PANI, PEDOT, etc. As a result of the organic electronic applications into the field of organic sensors, a wide variety of devices have been developed, for instance, ISOFET, OFET, EGOFET. For this reason, some applications of these devices have been explained for each organic semiconductor.

Chapter Contents:

  • Abstract
  • 7.1 Introduction
  • 7.2 pH sensors
  • 7.2.1 Poly(3-methylthiophene)
  • 7.2.2 Polyaniline
  • 7.2.3 Polypyrrole
  • 7.2.4 Poly(3-hexylthiophene-2,5-diyl)
  • 7.2.5 Pentacene
  • 7.2.6 Polytriarylamine
  • 7.2.7 5,5'-Bis-(7-dodecyl-9H-fluoren-2-yl)-2,2'-bithiophene
  • 7.2.8 -Sexithiophene
  • 7.2.9 Poly(3,4-ethylenedioxythiophene)
  • 7.3 Ion sensors in aqueous solution
  • 7.3.1 Poly(3-methylthiophene)
  • 7.3.2 Polyaniline
  • 7.3.3 Polycarbazole
  • 7.3.4 Poly(3,4-ethylenedioxythiophene): polystyrene sulfonate
  • 7.3.5 Poly 3-hexylthiophene
  • 7.3.6 Other semiconducting polymers
  • References

Inspec keywords: polymer electrolytes; chemical sensors; pH measurement; ion sensitive field effect transistors; electric potential; organic field effect transistors; organic semiconductors

Other keywords: EGOFET; organic polymer; biochemistry; pH sensor; ion-sensitive organic field effect transistor; PEDOT; electrolyte-gated organic field effect transistor; ISOFET; electrical potential; PANI; analytical chemistry; organic semiconductor; organic transistor; organic electronic application; organic sensor; P3MT; general ion sensor

Subjects: Insulated gate field effect transistors; Chemical sensors; Chemical sensors; Electrochemistry and electrophoresis; Chemical variables measurement

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