Nanotechnology is a new technology that has attracted more and more
attention in biomedicine, electronics, industry, and environmental applications.
Nanoparticles (NPs) have several applications in a number of social fields because of
their exceptional optical, catalytic, thermal, and electrical capabilities. Magnetic NPs
(MNPs), which feature exceptional superparamagnetism, a sizable specific surface
area, simplicity of surface modification, chemical stability, biocompatibility, and high
mass transfer, are one of the most crucial key types. Owing to these features, ferro-MNPs (FMNPs) have received large consideration because of their applications in
medicine, biosensing, catalysis, agriculture, and the environment. This chapter briefly
introduces the main synthesis methods of FMNPs and describes the characterization
and composition of nano-biosensors. Then, the potential applications of FMNP-based
nano-biosensors in diverse fields are discussed through typical examples. Finally, the
research status, challenges, and development prospects of FMNP-based nano-biosensors are summarized.
Keywords: Environmental monitoring, Magnetic nanoparticles, Nano-biosensor
