The evolution of the particle shape distribution during the formation of iron nanoparticles in the presence of tubular lecithin assemblies

Author

Cain, Jason L. ; Nikles, David E.

Author_Institution

Dept. of Chem., Alabama Univ., Tuscaloosa, AL, USA

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

3718

Lastpage

3720

Abstract

Iron particles were prepared by the sodium borohydride reduction of ferrous ion in tubular lecithin assemblies and a 1200 Oe magnetic field. When the reaction was quenched after two minutes more than 90% of the particles were acicular, single crystal iron. As the reaction proceeded the percentage of acicular particles decreased, while spherical and chains-of-sphere particles were formed. After 30 minutes the predominant particle shape was chains-of-spheres. This change in particle shape distribution was attributed to the break-up of the lecithin assemblies during the course of the reduction

Keywords

ferromagnetic materials; iron; magnetic particles; nanostructured materials; particle size; 30 min; Fe; Fe particles; acicular particles; chains-of-sphere particles; particle shape distribution; sodium borohydride reduction; spherical particles; tubular lecithin assemblies; Aerosols; Assembly; Electrons; Ethanol; Hydrocarbons; Iron; Magnetic fields; Magnetic particles; Nanoparticles; Shape;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.619549

Filename

619549