Investigation of Co nanoparticles with EXAFS and XANES

被引：65
作者：
Cheng, GJ [1 ]
Carter, JD [1 ]
Guo, T [1 ]
机构：
[1] Univ Calif Davis, Dept Chem, Davis, CA 95616 USA
来源：
CHEMICAL PHYSICS LETTERS | 2004年 / 400卷 / 1-3期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1016/j.cplett.2004.10.095
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：
3, 5, and 12-nm Co nanoparticles were synthesized via thermo-decomposition. Extended X-ray absorption fine structure (EXAFS) and X-ray absorption near-edge structure (XANES) were used to probe the structures of these nanoparticles. Simulations were carried out to compare the EXAFS profiles of three different crystalline phases of Co. The results of EXAFS and XANES suggested that the reactivity of these nanoparticles towards their environment is inversely proportional to their size. Sharp decreases in the amplitude of EXAFS of these nanoparticles were observed. which could be attributed to the existence of the disorder in those crystalline nanostructures. (C) 2004 Elsevier B.V. All rights reserved.
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收藏
页码：122 / 127
页数：6
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