Sub 5 nm magnetite nanoparticles: Synthesis, microstructure, and magnetic properties

Jun Hua Wu; Seung Pil Ko; Hong Ling Liu; Sangsig Kim; Jae Seon Ju; Young Keun Kim

doi:10.1016/j.matlet.2006.11.032

Sub 5 nm magnetite nanoparticles: Synthesis, microstructure, and magnetic properties

Jun Hua Wu, Seung Pil Ko, Hong Ling Liu, Sangsig Kim, Jae Seon Ju, Young Keun Kim

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

105 Citations (Scopus)

Abstract

Magnetite particles of 2-4 nm were synthesized by an economic, biocompatible chemical coprecipitation route, with their size tuned by the reaction temperature. The microstructure and morphology of the nanoparticles were characterized by X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM), whereas the magnetic properties were investigated by vibrating sample magnetometry (VSM) and superconducting quantum interference device (SQUID). It is found that the nanoparticles demonstrate well-defined superparamagnetic behavior as prepared and after annealing. Distinct lattices were observed which manifest the high crystallinity of such ultrasmall particles and the finite-size effect was revealed by analyzing the corresponding microstructure and magnetism.

Original language	English
Pages (from-to)	3124-3129
Number of pages	6
Journal	Materials Letters
Volume	61
Issue number	14-15
DOIs	https://doi.org/10.1016/j.matlet.2006.11.032
Publication status	Published - 2007 Jun

Keywords

Coprecipitation
Magnetite
Nanoparticle
Superparamagnetism

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1016/j.matlet.2006.11.032

Cite this

@article{e2c9463f8c084d0ebba5e225cec372ef,

title = "Sub 5 nm magnetite nanoparticles: Synthesis, microstructure, and magnetic properties",

abstract = "Magnetite particles of 2-4 nm were synthesized by an economic, biocompatible chemical coprecipitation route, with their size tuned by the reaction temperature. The microstructure and morphology of the nanoparticles were characterized by X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM), whereas the magnetic properties were investigated by vibrating sample magnetometry (VSM) and superconducting quantum interference device (SQUID). It is found that the nanoparticles demonstrate well-defined superparamagnetic behavior as prepared and after annealing. Distinct lattices were observed which manifest the high crystallinity of such ultrasmall particles and the finite-size effect was revealed by analyzing the corresponding microstructure and magnetism.",

keywords = "Coprecipitation, Magnetite, Nanoparticle, Superparamagnetism",

author = "Wu, {Jun Hua} and Ko, {Seung Pil} and Liu, {Hong Ling} and Sangsig Kim and Ju, {Jae Seon} and Kim, {Young Keun}",

note = "Funding Information: This work was supported by the Korea Research Foundation Grants KRF-2005-210-D00023 and KRF-2004-005-D00057, by the Grant A050750 of the Korea Health 21 R&D Project, Ministry of Health & Welfare, and by Grant M10500000105-05J0000-10510 from the National Research Laboratory Program of the Korea Science and Engineering Foundation. ",

year = "2007",

month = jun,

doi = "10.1016/j.matlet.2006.11.032",

language = "English",

volume = "61",

pages = "3124--3129",

journal = "Materials Letters",

issn = "0167-577X",

publisher = "Elsevier",

number = "14-15",

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TY - JOUR

T1 - Sub 5 nm magnetite nanoparticles

T2 - Synthesis, microstructure, and magnetic properties

AU - Wu, Jun Hua

AU - Ko, Seung Pil

AU - Liu, Hong Ling

AU - Kim, Sangsig

AU - Ju, Jae Seon

AU - Kim, Young Keun

N1 - Funding Information: This work was supported by the Korea Research Foundation Grants KRF-2005-210-D00023 and KRF-2004-005-D00057, by the Grant A050750 of the Korea Health 21 R&D Project, Ministry of Health & Welfare, and by Grant M10500000105-05J0000-10510 from the National Research Laboratory Program of the Korea Science and Engineering Foundation.

PY - 2007/6

Y1 - 2007/6

N2 - Magnetite particles of 2-4 nm were synthesized by an economic, biocompatible chemical coprecipitation route, with their size tuned by the reaction temperature. The microstructure and morphology of the nanoparticles were characterized by X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM), whereas the magnetic properties were investigated by vibrating sample magnetometry (VSM) and superconducting quantum interference device (SQUID). It is found that the nanoparticles demonstrate well-defined superparamagnetic behavior as prepared and after annealing. Distinct lattices were observed which manifest the high crystallinity of such ultrasmall particles and the finite-size effect was revealed by analyzing the corresponding microstructure and magnetism.

AB - Magnetite particles of 2-4 nm were synthesized by an economic, biocompatible chemical coprecipitation route, with their size tuned by the reaction temperature. The microstructure and morphology of the nanoparticles were characterized by X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM), whereas the magnetic properties were investigated by vibrating sample magnetometry (VSM) and superconducting quantum interference device (SQUID). It is found that the nanoparticles demonstrate well-defined superparamagnetic behavior as prepared and after annealing. Distinct lattices were observed which manifest the high crystallinity of such ultrasmall particles and the finite-size effect was revealed by analyzing the corresponding microstructure and magnetism.

KW - Coprecipitation

KW - Magnetite

KW - Nanoparticle

KW - Superparamagnetism

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U2 - 10.1016/j.matlet.2006.11.032

DO - 10.1016/j.matlet.2006.11.032

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VL - 61

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JO - Materials Letters

JF - Materials Letters

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