Classification of Biosensors Based on Trasducers

Biosensors can be classified based on the type of transducer used to convert the biological signal into a measurable signal. Some common types of transducers used in biosensors include:

Optical transducers: These biosensors transform a biological signal from a quantifiable signal using light as the transduction medium. Surface plasmon resonance (SPR) biosensors and fluorescence-based biosensors are two types of optical biosensors.

Electrochemical transducers: Electrochemical biosensors uses electrodes to recognize and quantify alterations in the electrical characteristics of a biological sample. Potentiometric, amperometric, and impedimetric biosensors are a few types of electrochemical biosensors.

Piezoelectric transducers: Piezoelectric biosensors use crystals that generate an electrical signal when mechanical stress is applied to them. Quartz crystal microbalance (QCM) biosensors are examples of piezoelectric biosensors.

Thermal transducers: Thermal biosensors detect and measure changes in a biological sample by using temperature variations. Thermometric and calorimetric biosensors are examples of thermal biosensors.

Magnetic transducers: Magnetic biosensors detect and measure changes in a biological sample by using variations in magnetic fields. Magnetoresistive and magnetic particle detection biosensors are examples of magnetic biosensors.

Overall, the transducer used in a biosensor is determined by the application and the qualities of the biological material being studied. Each form of transducer has advantages and disadvantages, and researchers are always attempting to create new and creative biosensors that use various transduction methods.