title: Size control and characterization of wustite (core)/spinel (shell) nanocubes obtained by decomposition of iron oleate complex.
abstract: Monodisperse wustite (core)/spinel (shell) nanocubes with controllable size from 9 to 22 nm were synthesized by the decomposition of iron oleate complex at high temperature. The composition of the nanocubes was confirmed by X-ray diffraction and magnetic analysis, meanwhile the distributions of wustite and spinel phases within the nanocubes were directly observed by high resolution transmission electron microscopy using the dark-field image technique. The core/shell structure is quite unique, in which spinel phase is distributed not only preferentially on the surface, but also in the interior, while almost all of the wustite phase is located in the core of the nanocubes. The formation of wustite is inherent in the decomposition of the iron oleate complex, as indirectly inferred through the detection of a huge quantity of carbon monoxide generated from the reactor.
authors.affiliation: Graduate School of Engineering, Department of Electronic Engineering, Tohoku University, 6-6-05 Aza-Aoba, Aramaki, Sendai 980-8579, Japan. phai@ecei.tohoku.ac.jp
authors.forename: Hoang Tri
authors.initials: HT
authors.lastname: Hai
authors.forename: Hai Tao
authors.initials: HT
authors.lastname: Yang
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Kura
authors.forename: Daiji
authors.initials: D
authors.lastname: Hasegawa
authors.forename: Yasunobu
authors.initials: Y
authors.lastname: Ogata
authors.forename: Migaku
authors.initials: M
authors.lastname: Takahashi
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Ogawa
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry*; D005296:Ferrous Compounds / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D008277:Magnesium Oxide / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D009829:Oleic Acids / Q000737:chemistry*; D010316:Particle Size; D013499:Surface Properties; D013696:Temperature
chemical_list: D005296:Ferrous Compounds; D009829:Oleic Acids; C111130:spinell; D008277:Magnesium Oxide; D007501:Iron; C034236:ferrous oxide; D000537:Aluminum Oxide