Magnetic nanoparticles have received great attention in various fields due to their unique physicochemical properties and wide application potential.In the past decade, the synthesis and application of magnetic nanoparticles from the bottom up has been a hot topic in the field of chemistry, chemical engineering, materials science and biomedicine. High-quality magnetic nanoparticles can be synthesized by chemical methods such as coprecipitation, high temperature thermal decomposition, and sol-gel methods. Compared to the top-down synthesis method, the bottom-up synthesis method can synthesize nanoparticles with uniform particle size and can be widely used in various fields: data storage, catalysts, biological separation and biosensing. A typical magnetic nanoparticle is synthesized by a bottom-up method comprising…