Controlling the size of magnetic nanoparticles using pluronic block copolymer surfactants

Jr-iuan Lai; Kurikka V.P.M. Shafi; Abraham Ulman; Katja Loos; Yongjae Lee; Thomas Vogt; Wei-Li Lee; N.P. Ong; Claude Estournès

doi:10.1021/jp0457702

Controlling the size of magnetic nanoparticles using pluronic block copolymer surfactants

Jr-iuan Lai, Kurikka V.P.M. Shafi, Abraham Ulman, Katja Loos, Yongjae Lee, Thomas Vogt, Wei-Li Lee, N.P. Ong, Claude Estournès

Research output: Contribution to journal › Letter › Academic › peer-review

51 Citations (Scopus)

Abstract

We have successfully controlled the size of magnetic nanoparticles by adjusting the surfactant/solvent ratio. gamma-Fe2O3 nanoparticles of 5.6 and 12.7, and Fe-0 nanoparticles of 22.3 nm in diameter were prepared, all having spherical shape and uniform size as confirmed by TEM. Mossbauer spectra confirmed Fe 31 for the 5.6 and 12.7 run particles and Fe3+ and Fe-0 for 22.3 nm particles, in good agreement with synchrotron XRD patterns. Both room temperature and 5 K H-M measurements show that 22.3 nm particles have much higher magnetization than their oxide Counterparts, in agreement with their being Fe-0. T-M measurements show superparamagnetism for 5.6 and 12.7 nm particles and ferromagnetism for 22.3 nm particles.

Original language	English
Pages (from-to)	15-18
Number of pages	4
Journal	Journal of Physical Chemistry B
Volume	109
Issue number	1
DOIs	https://doi.org/10.1021/jp0457702
Publication status	Published - 13-Jan-2005

Keywords

NANOCRYSTAL SUPERLATTICES

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title = "Controlling the size of magnetic nanoparticles using pluronic block copolymer surfactants",

abstract = "We have successfully controlled the size of magnetic nanoparticles by adjusting the surfactant/solvent ratio. gamma-Fe2O3 nanoparticles of 5.6 and 12.7, and Fe-0 nanoparticles of 22.3 nm in diameter were prepared, all having spherical shape and uniform size as confirmed by TEM. Mossbauer spectra confirmed Fe 31 for the 5.6 and 12.7 run particles and Fe3+ and Fe-0 for 22.3 nm particles, in good agreement with synchrotron XRD patterns. Both room temperature and 5 K H-M measurements show that 22.3 nm particles have much higher magnetization than their oxide Counterparts, in agreement with their being Fe-0. T-M measurements show superparamagnetism for 5.6 and 12.7 nm particles and ferromagnetism for 22.3 nm particles.",

keywords = "NANOCRYSTAL SUPERLATTICES",

author = "Jr-iuan Lai and Shafi, {Kurikka V.P.M.} and Abraham Ulman and Katja Loos and Yongjae Lee and Thomas Vogt and Wei-Li Lee and N.P. Ong and Claude Estourn{\`e}s",

note = "Relation: http://www.rug.nl/scheikunde/ date_submitted:2006 Rights: University of Groningen. Materials Science Centre",

year = "2005",

month = jan,

day = "13",

doi = "10.1021/jp0457702",

language = "English",

volume = "109",

pages = "15--18",

journal = "Journal of Physical Chemistry B",

issn = "1089-5647",

publisher = "AMER CHEMICAL SOC",

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T1 - Controlling the size of magnetic nanoparticles using pluronic block copolymer surfactants

AU - Lai, Jr-iuan

AU - Shafi, Kurikka V.P.M.

AU - Ulman, Abraham

AU - Loos, Katja

AU - Lee, Yongjae

AU - Vogt, Thomas

AU - Lee, Wei-Li

AU - Ong, N.P.

AU - Estournès, Claude

N1 - Relation: http://www.rug.nl/scheikunde/ date_submitted:2006 Rights: University of Groningen. Materials Science Centre

PY - 2005/1/13

Y1 - 2005/1/13

N2 - We have successfully controlled the size of magnetic nanoparticles by adjusting the surfactant/solvent ratio. gamma-Fe2O3 nanoparticles of 5.6 and 12.7, and Fe-0 nanoparticles of 22.3 nm in diameter were prepared, all having spherical shape and uniform size as confirmed by TEM. Mossbauer spectra confirmed Fe 31 for the 5.6 and 12.7 run particles and Fe3+ and Fe-0 for 22.3 nm particles, in good agreement with synchrotron XRD patterns. Both room temperature and 5 K H-M measurements show that 22.3 nm particles have much higher magnetization than their oxide Counterparts, in agreement with their being Fe-0. T-M measurements show superparamagnetism for 5.6 and 12.7 nm particles and ferromagnetism for 22.3 nm particles.

AB - We have successfully controlled the size of magnetic nanoparticles by adjusting the surfactant/solvent ratio. gamma-Fe2O3 nanoparticles of 5.6 and 12.7, and Fe-0 nanoparticles of 22.3 nm in diameter were prepared, all having spherical shape and uniform size as confirmed by TEM. Mossbauer spectra confirmed Fe 31 for the 5.6 and 12.7 run particles and Fe3+ and Fe-0 for 22.3 nm particles, in good agreement with synchrotron XRD patterns. Both room temperature and 5 K H-M measurements show that 22.3 nm particles have much higher magnetization than their oxide Counterparts, in agreement with their being Fe-0. T-M measurements show superparamagnetism for 5.6 and 12.7 nm particles and ferromagnetism for 22.3 nm particles.

KW - NANOCRYSTAL SUPERLATTICES

U2 - 10.1021/jp0457702

DO - 10.1021/jp0457702

M3 - Letter

SN - 1089-5647

VL - 109

SP - 15

EP - 18

JO - Journal of Physical Chemistry B

JF - Journal of Physical Chemistry B

IS - 1

ER -

Controlling the size of magnetic nanoparticles using pluronic block copolymer surfactants

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Keywords

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