Synthesis, characterization, and magnetic studies of nonagglomerated zerovalent iron particles. Unexpected size dependence of the structure

被引：55

作者：

deCaro, D

Ould-Ely, T

Mari, A

Chaudret, B

Snoeck, E

Respaud, M

Broto, JM

Fert, A

机构：

[1] INST NATL POLYTECH TOULOUSE, F-31077 TOULOUSE, FRANCE

[2] CNRS, CEMES, LOE, F-31055 TOULOUSE, FRANCE

[3] INST NATL SCI APPL, PHYS SOLIDES LAB, F-31077 TOULOUSE, FRANCE

来源：

CHEMISTRY OF MATERIALS | 1996年 / 8卷 / 08期

关键词：

D O I：

10.1021/cm950599f

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Sonolysis of a solution of Fe(CO)(5) in anisol in the presence of poly(dimethylphenylene oxide) (PPO) leads to the formation of small nonagglomerated iron particles. HREM analysis shows that the size of the particles is centered around 30 Angstrom with a medium dispersity. HREM analysis of the particles demonstrate that the smaller particles (less than or equal to 25 Angstrom) adopt the alpha-Fe (bcc) structure, whereas the larger ones (greater than or equal to 25 Angstrom) adopt the gamma-Fe (fcc) structure. Magnetic measurements confirm the presence of small superparamagnetic particles (alpha-Fe) and of mostly antiferromagnetic or paramagnetic particles (gamma-Fe).

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页码：1987 / 1991

页数：5

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