Introduction to Biosensors by Jeong-Yeol Yoon

Author:Jeong-Yeol Yoon
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

10. Electrochemical Sensors

Jeong-Yeol Yoon1

(1)University of Arizona, Tucson, AZ, USA

Jeong-Yeol Yoon

Email: [email protected]

As indicated in previous chapters, the top two most popular transducers for biosensors are optical and electrochemical, followed by piezoelectric and thermal. We have already learned a great deal of optical transducers and equipment for biosensor applications in Chaps. 8 and 9. In this chapter, we will learn another very popular transducer for biosensors: electrochemical.

Electrochemical sensors are essentially electrochemical transducers , where the concentrations of ions or chemicals are converted into electrical voltage ( potentiometric ), electrical current ( amperometric ), or electrical resistance/conductance ( conductometric ). If electrochemical sensors are used together with bioreceptors (enzymes or antibodies), they become electrochemical biosensors .

In this chapter, we will learn the basic electrochemistry (electrochemical cells), which involves:(1)Ion-selective electrodes including pH electrode as an example of potentiometric electrochemical sensors;

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