Ferrofluids: From Preparation to Biomedical Applications

Discovery of the magnetic property (superparamagnetism) of ferrofluid (i.e., magnetic fluid) and its effects on the other materials open wide varieties of applications in human daily life. Continually, new applications require different forms of magnetic materials, which have significant attractions nowadays. This review highlights the ferrofluids synthesis methods. All known methods are cited, and a special interest is focused on the most commonly used methods for preparation, which depends on size reduction and chemical co-precipitation. Furthermore, the industrial and biomedical applications of ferrofluids and their based particles are discussed. Finally, the new water based dispersed ferrofluids particles "magnetic emulsion" is also introduced.