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Impedimetric Biosensors for Medical Applications by Natalie A. Hirst, Jo V. Rushworth

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2. Biosensors

2.1 Brief history of biosensor development

A biosensor in its most simple form may be described as a device comprising three parts: a biological recognition system, a transducer, and a signal processing display (Conroy et al., 2009). Interaction of the analyte of interest with the biorecognition element is converted to a measurable signal by the transducer, before conversion to the readout or display (Vo-Dinh and Cullum, 2000). The basic structure of a biosensor is illustrated in Figure 2-1.

Figure 2-1 Schematic of a biosensor.

The three basic components of a biosensor are a biorecognition element, a transducer and a readout display. ...

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