Bacterial Aerobic Synthesis of Nanocrystalline Magnetite

摘要

Oxide nanoparticles are important in applications such as catalysis,electronics,and anti-microbial coatings.Interest in the synthesis of iron oxide nanoparticles,especially magnetite,has centered on applications such as multi-terabit magnetic storage devices,ferrofluids,MRI contrast enhancement agents,and separation processes.Chemical methods for preparing magnetic iron oxide nanoparticles are energy intensive,employ toxic chemicals,and often yield particles in nonpolar organic solutions,thus precluding biomedical application.In contrast,biological magnetite synthesis occurs in water at room temperature and close to neutral pH.