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3. Main types of biosensors
Numerous transducers have been used to develop biosensors. The nature of the transducer is often the basis for classifying different biosensors.
3.1 Electrochemical biosensors
The principle of electrochemical biosensors is based on the immobilization of a ligand on an electrode. The biochemical response to the addition of a substrate is transformed into an amplified, quantifiable electrical signal. Electrochemical biosensors can be conductometric, potentiometric or amperometric.
Conductimetric biosensors are based on the principle of modifying the conductivity of a medium between two electrodes when micro-organisms metabolize uncharged substrates, such as sugars, into intermediate compounds such as lactic acid. The quantity of charged...
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Main types of biosensors
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