title: Shape and size controlled synthesis of uniform iron oxide nanocrystals through new non-hydrolytic routes.
abstract: New, non-hydrolytic routes to synthesize highly crystalline iron oxide nanocrystals (8-40 nm, magnetite) are described in this report whereby particle size and morphology were precisely controlled through reactant (precursor, e.g. (FeO(OH)) ratios, co-surfactant and organic additive, and/or reaction time. Particle size, with high monodispersivity (<10%), is demonstrated to be a function of precursor concentrations and through the addition of different cosurfactants and/or additives, cubic, octahedral, potato-like, and flower-like iron oxide nanocrystals can be reproducibly synthesized through simple one-pot thermal decomposition methods. High resolution transmission electron microscope, x-ray diffraction, and superconducting quantum interference device were used to characterize the size, structure and magnetic properties of the resulting nanocrystals. For aqueous applications, materials synthesized/purified in organic solvents are broadly water dispersible through a variety of phase (aqueous) transfer method(s).
authors.affiliation: Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis, St. Louis, MO 63130, USA.
authors.forename: Wenlu
authors.initials: W
authors.lastname: Li
authors.forename: Seung Soo
authors.initials: SS
authors.lastname: Lee
authors.forename: Jiewei
authors.initials: J
authors.lastname: Wu
authors.forename: Carl H
authors.initials: CH
authors.lastname: Hinton
authors.forename: John D
authors.initials: JD
authors.lastname: Fortner