Abstract
This chapter describes various applications of quantum dots (QDs) in biomedical, bio-imaging, biosensors etc. The comparative study of various articles is reported here. Also, various characterization techniques are discussed. Combination of QDs and magnetic nanoparticles (MNPs) as magnetic QDs (MQDs) has a broad range of applications as multifunctional nanoscale devices in biological imaging, medical nanodiagnostics and nanomedicine. MQDs derived from iron oxide nanoparticles and QDs possess excellent superparamagnetic and fluorescent properties, respectively, making them multifunctional nanoprobes because of the following features: (1) strong magnetic strength with tunable functionality, such as rapid and simple magnetic separation; (2) intense and stable fluorescence from QDs combined with tunable biological functionality upon QDs’ bio-activation; and (3) imaging/visualization by simple ultraviolet light exposure.
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