Phase Composition of Iron Oxide Nanoparticles Studied Using Hard X-ray Absorption Spectroscopy

被引：6

作者：

Sun, Xiao ^{[1
]}

Tayal, Akhil ^{[1
]}

Ullrich, Aladin ^{[2
]}

Petracic, Oleg ^{[3
,4
]}

Haas, Sylvio ^{[1
]}

机构：

[1] Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany

[2] Univ Augsburg, Lehrstuhl Expt Phys 4, D-26522 Augsburg, Germany

[3] Forschungszentrum Julich GmbH, Julich Ctr Neutron Sci JCNS, D-52425 Julich, Germany

[4] Forschungszentrum Julich GmbH, Peter Grunberg Inst PGI, JARA FIT, D-52425 Julich, Germany

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2023年 / 127卷 / 25期

关键词：

EXCHANGE BIAS; OXIDATION-STATE; VERWEY TRANSITION; XANES; EDGE; FE; TRANSFORMATION; MAGNETITE; MAGHEMITE;

D O I：

10.1021/acs.jpcc.3c01023

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：

At the surface ofiron oxide nanoparticles, an oxidizedor disorderedlayer is often found. Due to the large surface-to-volume ratio ofnanomaterials, such a surface layer plays an important role in theoverall magnetic properties of the particles. Consequently, it isimportant to characterize the surface layer if applications of ironoxide nanoparticles, e.g., for magnetic hyperthermia, magnetic particleimaging, or ferrofluidics, are envisaged. In this work, we tuned thephase of the surface layer of 14 nm iron oxide nanoparticles via annealingprocedures. The phase composition of the particles is systematicallystudied using hard X-ray absorption spectroscopy.

引用

页码：12077 / 12083

页数：7

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