2. Principles of chemical sensor operation
2.1 Definition of a chemical sensor and its characteristics
A chemical sensor is a device that detects, identifies, or quantifies a target chemical species by converting a specific chemical interaction into a measurable signal. It comprises a recognition layer, which selectively interacts with the target species, and a transducer, which converts this interaction into a signal that can be used by a measurement system.
Conjugated polymers can be used as recognition layers in chemical sensors. In this case, the capture of a target analyte by a receptor immobilized in a conductive polymer generates a measurable analytical signal that is converted into an electrical or optical signal (Figure
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Principles of chemical sensor operation
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