Characterization of Monodisperse Wustite Nanoparticles following Partial Oxidation

被引：74

作者：

Chen, Chih-Jung ^{[1
,2
]}

Chiang, Ray-Kuang ^{[1
]}

Lai, Hsin-Yi ^{[2
]}

Lin, Chun-Rong ^{[3
]}

机构：

[1] Far E Univ, Dept Mat Sci & Engn, Nanomat Lab, Hsing Shih 74448, Tainan County, Taiwan

[2] Natl Cheng Kung Univ, Dept Mech Engn, Tainan 701, Taiwan

[3] So Taiwan Univ Technol, Dept Mech Engn, Tainan 710, Taiwan

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2010年 / 114卷 / 10期

关键词：

IRON-OXIDE NANOPARTICLES; DEFECT;

D O I：

10.1021/jp908153y

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

Monodisperse Fe1-xO nanoparticles (NPs) with a mean size of 21.7 +/- 2.1 nm were prepared by the thermal decomposition of iron(III) oleate complex at 380 degrees C using oleic acid as the solvent. Variation in their composition was monitored using XRD for a period of 120 days under ambient conditions, under which the dominant phase changed from wustite to a spinel-type iron oxide phase. HR-TEM images and absorption spectra of the 10-day sample further revealed all FeO/spinel-type phase core-shell Structure. Exchange-bias coupling oil the interfaces between the wustite and the spinel-type phase accompanied the variation in composition. The dependence of H-E on temperature demonstrates that the H-E onset temperature is approximately 200 K, which correlates with the T-N of bulk FeO.

引用

页码：4258 / 4263

页数：6

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