Abstract

The ever increasing requirement of ultrasensitive biosensing has resulted in the development of multiple signal amplification approaches. Experts in various fields have largely considered magnetic nanoparticles (MNPs) for developing and fabricating biosensors for numerous utilizations. It is possible to integrate MNPs into transducer substances and/or disperse them in the specimen accompanied by their attractions via an exterior magnetic field over the active detection surface of the biosensor. Based on their specific features-that is, biocompatibility, simplistic synthesis, and electroconductivity-diverse MNPs are very good nanomaterials for applications in electrochemical biosensing. Hence the present chapter demonstrates how MNPs have a prominent involvement in developing electrochemical biosensors like immunosensors, aptasensors, enzymatic biosensors, and deoxyribonucleic acid (DNA) biosensors. Moreover, we address further research and views of the (bio) sensors based on MNPs. © 2021 Elsevier Inc. All rights reserved.