Facile synthesis of size-controllable monodispersed ferrite nanospheres

Shou Hu Xuan; Feng Wang; Yi Xiang J. Wang; Jimmy C. Yu; Ken C F LEUNG

doi:10.1039/C0JM00159G

Facile synthesis of size-controllable monodispersed ferrite nanospheres

Shou Hu Xuan, Feng Wang, Yi Xiang J. Wang, Jimmy C. Yu, Ken C F LEUNG^*

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Journal article › peer-review

210 Citations (Scopus)

Abstract

Monodispersed ferrite nanospheres were synthesized in an ethylene glycol/diethylene glycol (EG/DEG) binary solvent by using poly(vinylpyrrolidone) (PVP) as the surfactant. Particle size control can be attained by careful adjustment of the V_EG/V_DEG ratio. Different from previous reports, the magnetic studies of our iron ferrite (Fe₃O₄) nanospheres with various sizes from 20 to 300 nm reveal that they exhibit a similar magnetic saturation (M_s) value. In particular, both the ferromagnetic and superparamagnetic Fe₃O₄ nanospheres with similar M_s can be selectively obtained by varying the H₂O concentration in the reaction system. The magnetic resonance imaging (MRI) characterization indicates that the as-prepared superparamagnetic Fe₃O₄ and ZnFe₂O₄ nanospheres possess a T₂ relaxivity range that can be used as potential MRI contrast agents.

Original language	English
Pages (from-to)	5086-5094
Number of pages	9
Journal	Journal of Materials Chemistry
Volume	20
Issue number	24
DOIs	https://doi.org/10.1039/C0JM00159G
Publication status	Published - 28 Jun 2010

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title = "Facile synthesis of size-controllable monodispersed ferrite nanospheres",

abstract = "Monodispersed ferrite nanospheres were synthesized in an ethylene glycol/diethylene glycol (EG/DEG) binary solvent by using poly(vinylpyrrolidone) (PVP) as the surfactant. Particle size control can be attained by careful adjustment of the VEG/VDEG ratio. Different from previous reports, the magnetic studies of our iron ferrite (Fe3O4) nanospheres with various sizes from 20 to 300 nm reveal that they exhibit a similar magnetic saturation (Ms) value. In particular, both the ferromagnetic and superparamagnetic Fe3O4 nanospheres with similar Ms can be selectively obtained by varying the H2O concentration in the reaction system. The magnetic resonance imaging (MRI) characterization indicates that the as-prepared superparamagnetic Fe3O4 and ZnFe2O4 nanospheres possess a T2 relaxivity range that can be used as potential MRI contrast agents.",

author = "Xuan, {Shou Hu} and Feng Wang and Wang, {Yi Xiang J.} and Yu, {Jimmy C.} and LEUNG, {Ken C F}",

year = "2010",

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doi = "10.1039/C0JM00159G",

language = "English",

volume = "20",

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T1 - Facile synthesis of size-controllable monodispersed ferrite nanospheres

AU - Xuan, Shou Hu

AU - Wang, Feng

AU - Wang, Yi Xiang J.

AU - Yu, Jimmy C.

AU - LEUNG, Ken C F

PY - 2010/6/28

Y1 - 2010/6/28

N2 - Monodispersed ferrite nanospheres were synthesized in an ethylene glycol/diethylene glycol (EG/DEG) binary solvent by using poly(vinylpyrrolidone) (PVP) as the surfactant. Particle size control can be attained by careful adjustment of the VEG/VDEG ratio. Different from previous reports, the magnetic studies of our iron ferrite (Fe3O4) nanospheres with various sizes from 20 to 300 nm reveal that they exhibit a similar magnetic saturation (Ms) value. In particular, both the ferromagnetic and superparamagnetic Fe3O4 nanospheres with similar Ms can be selectively obtained by varying the H2O concentration in the reaction system. The magnetic resonance imaging (MRI) characterization indicates that the as-prepared superparamagnetic Fe3O4 and ZnFe2O4 nanospheres possess a T2 relaxivity range that can be used as potential MRI contrast agents.

AB - Monodispersed ferrite nanospheres were synthesized in an ethylene glycol/diethylene glycol (EG/DEG) binary solvent by using poly(vinylpyrrolidone) (PVP) as the surfactant. Particle size control can be attained by careful adjustment of the VEG/VDEG ratio. Different from previous reports, the magnetic studies of our iron ferrite (Fe3O4) nanospheres with various sizes from 20 to 300 nm reveal that they exhibit a similar magnetic saturation (Ms) value. In particular, both the ferromagnetic and superparamagnetic Fe3O4 nanospheres with similar Ms can be selectively obtained by varying the H2O concentration in the reaction system. The magnetic resonance imaging (MRI) characterization indicates that the as-prepared superparamagnetic Fe3O4 and ZnFe2O4 nanospheres possess a T2 relaxivity range that can be used as potential MRI contrast agents.

U2 - 10.1039/C0JM00159G

DO - 10.1039/C0JM00159G

M3 - Journal article

SN - 0959-9428

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SP - 5086

EP - 5094

JO - Journal of Materials Chemistry

JF - Journal of Materials Chemistry

IS - 24

ER -

Facile synthesis of size-controllable monodispersed ferrite nanospheres

Abstract

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