Multi-scale analysis of the nanostructured granular solid CoO-Ag by TEM and EELS

被引：11

作者：

Yu-Zhang, K

Imhoff, D

Leprince-Wang, Y

Zhou, SM

Chien, CL

机构：

[1] Univ Reims, Dept Phys, Lab Anal Solides Surfaces Interfaces, DTI, F-51687 Reims 02, France

[2] Univ Paris 11, Phys Solides Lab, F-91405 Orsay, France

[3] Univ Marne La Vallee, Lab Phys Mat Divises & Interfaces, F-77454 Marne La Vallee 2, France

[4] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

来源：

ACTA MATERIALIA | 2003年 / 51卷 / 04期

关键词：

nanoparticles; antiferromagnetic materials; energy dispersive X-ray spectroscopy; transmission electron microscopy; electron energy loss spectroscopy;

D O I：

10.1016/S1359-6454(02)00520-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nanostructured granular solid consisting of antiferromagnetic Coo particles embedded in a metallic medium (Ag) has been investigated by both transmission electron microscopy (TEM) and electron energy loss spectroscopy (EELS) on a multiple scale. Quantitative composition determination was carried out by energy dispersive X-ray spectroscopy (EDXS) for Ag and Co, and by EELS for oxygen and Co quantification. Because of the complex morphology of the indicated CoO-Ag granular system, only a detailed analysis of the spatial variation of the EELS signals can provide information on the particle size and distribution. A mean size of 5 run for Coo particles has been evaluated. The oxidation state of Co has also been studied using fine structures on EELS spectra. Coo phase is clearly identified as the oxide but appears mixed with small metallic Co area. (C) 2002 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.

引用

页码：1157 / 1166

页数：10

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