67. Shaping Iron Oxide Nanocrystals for Magnetic Separation Applications
Martín Testa-Anta, Sara Liébana-Viñas, Beatriz Rivas-Murias, Benito Rodríguez-González, Michael Farle, Verónica Salgueiriño
Nanoscale (2018), 10, 20462-20467 (DOI: 10.1039/C8NR05864D).
Iron oxide nanostructures are attractive for a variety of bio-related applications given their wide range of magnetic properties. Here, we report on the study of the magnetophoretic mobility of octapod-shaped nanocrystals, which we relate to stoichiometry, quality and elongation in the <111> direction of these cubic structures. This special morphology combines magnetocrystalline anisotropies, increases shape anisotropy and hinders the formation of an epitaxial wüstite-magnetite interface. As a result, one obtains nanocrystals with large magnetic susceptibility and small coercivity, that is, with optimum characteristics for magnetic guidance, separation, and drug delivery, due to the increased magnetophoretic mobility displayed.