Hematite nano cubes and the prototypes of their self assembly investigated using TEM

Conference · Fri Aug 01 04:00:00 EDT 1997

OSTI ID:501005

Yu, S; Kan, S; Zou, G; Li, D; Sun, H; Peng, X; Zhang, X; Xiao, L; Li, T ^[1]

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1. Jilin Univ., Changchun (China)

Monodisperse hematite cubes about 30 nm in size have been prepared by aging a refluxing acidified aqueous solution of FeCl{sub 3} in an open vessel. The as-grown nano cubes were determined to be single crystalline hematite in perfect cubic shapes using transmission electron microscope and electron diffraction. The nano cube is one of the equilibrium shapes of hematite, which is assumed to be formed by preferential growth in certain crystallographic directions through the species diffusion in the aqueous solutions. Some self-assembly prototypes have been observed, such as the short range ordered buildup consisting of several brick-like hematite nano cubes and the nano box consisting of square plates of hematite nanocrystals. The drive force for the formation of the above assemblies is assumed to be the unique magnetic feature of the single crystalline hematite nano cubes. The perfect shape and the self-assembly feature make it possible to fabricate bulk ceramics orderly assembled using hematite nano cubes.

• OSTI ID: 501005
• Report Number(s): CONF-960401--; ISBN 1-55899-335-5
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTAL GROWTH
CRYSTAL STRUCTURE
HEMATITE
IRON CHLORIDES
PARTICLE SIZE
SYNTHESIS
TRANSMISSION ELECTRON MICROSCOPY