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High temperature stable monodisperse superparamagnetic core-shell iron-oxide@SnO2 nanoparticles

Appl. Phys. Lett. 95, 183112 (2009); doi:10.1063/1.3261756

Published 6 November 2009

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Xiaobin Xu, Mingyuan Ge, Cen Wang, and J. Z. Jiang
International Center for New-Structured Materials, Zhejiang University (ICNSM) and Laboratory of New-Structured Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
Monodisperse superparamagnetic SnO2-coated iron-oxide nanoparticles (~16.4  nm) have been synthesized via thermal decomposition. The thickness of SnO2 shells can be controlled from 1–5 nm. As-prepared SnO2-coated iron-oxide nanoparticles with high saturation magnetization (18  A m2/kg), are stable up to 600 °C, which can be formed stable ferrofluid. It was suggested that the SnO2 shell acts as a barrier of preventing the growth of gamma-Fe2O3 and consequently, avoiding the gamma-Fe2O3-to-alpha-Fe2O3 phase transition at high temperatures. ©2009 American Institute of Physics
History: Received 5 October 2009; accepted 19 October 2009; published 6 November 2009
Permalink: http://link.aip.org/link/?APPLAB/95/183112/1
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KEYWORDS and PACS

Keywords
PACS
  • 75.20.Ck
    Diamagnetism and paramagnetism in nonmetals
  • 75.50.Tt
    Fine-particle magnetic systems; nanocrystalline materials
  • 75.50.Mm
    Magnetic liquids
  • 75.75.Jn
  • YEAR: 2010

PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
Publisher:
AIP is a member of CrossRef AIP

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