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2023 | OriginalPaper | Chapter

22. Photoelectrochemical Biosensors

Authors : Sirlon F. Blaskievicz, Byanca S. Salvati, Alessandra Alves Correa, Lucia Helena Mascaro

Published in: Handbook of II-VI Semiconductor-Based Sensors and Radiation Detectors

Publisher: Springer International Publishing

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Abstract

Light is fundamental in many photochemical processes in biology and chemistry, and photo-induced processes such as charge generation/separation and charge transport/transfer can be exploited in areas such as analytical detection. In classical electrochemical sensors, the signal output is shown as a current, related to the concentration of the target (analyte). For photo-active electrodes, light radiation opens paths for signal amplification or even new reactions/detection. Among the advantages, light generation of charge carriers can: (i) interact directly with the analyte; (ii) interact with the analyte indirectly via a receptor, (iii) provide excited state intermediates that further generate a secondary analyte; or (iv) be used to amplify the sensor response. Light-activated biosensors have been reported in the literature for a wide range of analytes and as different complex architectures. In this sense, recent developments in photoelectrochemical biosensing methods based on Cd and Zn semiconductors materials will be summarised and discussed in the present chapter.

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Metadata
Title
Photoelectrochemical Biosensors
Authors
Sirlon F. Blaskievicz
Byanca S. Salvati
Alessandra Alves Correa
Lucia Helena Mascaro
Copyright Year
2023
DOI
https://doi.org/10.1007/978-3-031-24000-3_22

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