Interferometric Biosensors for Environmental Pollution Detection

One important step in the development of biosensors is the design and fabrication of a highly sensitive physical transducer, that is, a device capable of transforming efficiently a chemical or biological reaction into a measurable signal. There are several physical methods to obtain this transducing signal such as those based on amperometric, potentiometric or acoustic systems. However, transducers that make use of optical principles offer more attractive characteristics such as immunity to electromagnetic interference, possible use in aggressive environments and, in general, a higher sensitivity.

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