Synthesis, characterization and functionalization of nearly mono-disperse copper ferrite CuxFe3-xO4 nanoparticles

Bahar Nakhjavan; Muhammad Nawaz Tahir; M. Panthöfer; Haitao Gao; Thomas D. Schladt; Teuta Gasi; Vadim Ksenofontov; Robert Branscheid; Stefan Weber; Ute Kolb; Laura Maria Schreiber; Wolfgang Tremel

doi:10.1039/c0jm04577b

Synthesis, characterization and functionalization of nearly mono-disperse copper ferrite Cu_xFe_3-xO₄ nanoparticles

Bahar Nakhjavan, Muhammad Nawaz Tahir, M. Panthöfer, Haitao Gao, Thomas D. Schladt, Teuta Gasi, Vadim Ksenofontov, Robert Branscheid, Stefan Weber, Ute Kolb, Laura Maria Schreiber, Wolfgang Tremel^*

^*Corresponding author for this work

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

29 Scopus citations

Abstract

Magnetic nanocrystals are of great interest for a fundamental understanding of nanomagnetism and for their technological applications. Cu _xFe_3-xO₄ nanocrystals (x ≈ 0.32) with sizes ranging between 5 and 7 nm were synthesized starting from Cu(HCOO)₂ and Fe(CO)₅ using oleic acid and oleylamine as surfactants. The nanocrystals were characterized by high-resolution transmission electron microscopy (HRTEM), electron diffraction (ED), magnetization studies and Mössbauer spectroscopy. The Cu_xFe_3-xO₄ particles are superparamagnetic at room temperature 300 K with a saturation magnetization of 30.5 emu g^-1. Below their blocking temperature of 60 K, they become ferrimagnetic, and at 5 K they show a coercive field of 122 Oe and a saturation magnetization of 36.1 emu g^-1. The Cu _xFe_3-xO₄ nanoparticles were functionalized using a hydrophilic multifunctional polymeric ligand containing PEG(800) groups and a fluorophore. By virtue of their magnetic properties these nanoparticles may serve as contrast enhancing agents for magnetic resonance imaging (MRI).

Original language	English
Pages (from-to)	6909-6915
Number of pages	7
Journal	Journal of Materials Chemistry
Volume	21
Issue number	19
DOIs	https://doi.org/10.1039/c0jm04577b
State	Published - 21 May 2011
Externally published	Yes

ASJC Scopus subject areas

General Chemistry
Materials Chemistry

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10.1039/c0jm04577b

Cite this

Nakhjavan, B., Tahir, M. N., Panthöfer, M., Gao, H., Schladt, T. D., Gasi, T., Ksenofontov, V., Branscheid, R., Weber, S., Kolb, U., Schreiber, L. M., & Tremel, W. (2011). Synthesis, characterization and functionalization of nearly mono-disperse copper ferrite Cu_xFe_3-xO₄ nanoparticles. Journal of Materials Chemistry, 21(19), 6909-6915. https://doi.org/10.1039/c0jm04577b

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title = "Synthesis, characterization and functionalization of nearly mono-disperse copper ferrite CuxFe3-xO4 nanoparticles",

abstract = "Magnetic nanocrystals are of great interest for a fundamental understanding of nanomagnetism and for their technological applications. Cu xFe3-xO4 nanocrystals (x ≈ 0.32) with sizes ranging between 5 and 7 nm were synthesized starting from Cu(HCOO)2 and Fe(CO)5 using oleic acid and oleylamine as surfactants. The nanocrystals were characterized by high-resolution transmission electron microscopy (HRTEM), electron diffraction (ED), magnetization studies and M{\"o}ssbauer spectroscopy. The CuxFe3-xO4 particles are superparamagnetic at room temperature 300 K with a saturation magnetization of 30.5 emu g-1. Below their blocking temperature of 60 K, they become ferrimagnetic, and at 5 K they show a coercive field of 122 Oe and a saturation magnetization of 36.1 emu g-1. The Cu xFe3-xO4 nanoparticles were functionalized using a hydrophilic multifunctional polymeric ligand containing PEG(800) groups and a fluorophore. By virtue of their magnetic properties these nanoparticles may serve as contrast enhancing agents for magnetic resonance imaging (MRI).",

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AU - Nakhjavan, Bahar

AU - Tahir, Muhammad Nawaz

AU - Panthöfer, M.

AU - Gao, Haitao

AU - Schladt, Thomas D.

AU - Gasi, Teuta

AU - Ksenofontov, Vadim

AU - Branscheid, Robert

AU - Weber, Stefan

AU - Kolb, Ute

AU - Schreiber, Laura Maria

AU - Tremel, Wolfgang

PY - 2011/5/21

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N2 - Magnetic nanocrystals are of great interest for a fundamental understanding of nanomagnetism and for their technological applications. Cu xFe3-xO4 nanocrystals (x ≈ 0.32) with sizes ranging between 5 and 7 nm were synthesized starting from Cu(HCOO)2 and Fe(CO)5 using oleic acid and oleylamine as surfactants. The nanocrystals were characterized by high-resolution transmission electron microscopy (HRTEM), electron diffraction (ED), magnetization studies and Mössbauer spectroscopy. The CuxFe3-xO4 particles are superparamagnetic at room temperature 300 K with a saturation magnetization of 30.5 emu g-1. Below their blocking temperature of 60 K, they become ferrimagnetic, and at 5 K they show a coercive field of 122 Oe and a saturation magnetization of 36.1 emu g-1. The Cu xFe3-xO4 nanoparticles were functionalized using a hydrophilic multifunctional polymeric ligand containing PEG(800) groups and a fluorophore. By virtue of their magnetic properties these nanoparticles may serve as contrast enhancing agents for magnetic resonance imaging (MRI).

AB - Magnetic nanocrystals are of great interest for a fundamental understanding of nanomagnetism and for their technological applications. Cu xFe3-xO4 nanocrystals (x ≈ 0.32) with sizes ranging between 5 and 7 nm were synthesized starting from Cu(HCOO)2 and Fe(CO)5 using oleic acid and oleylamine as surfactants. The nanocrystals were characterized by high-resolution transmission electron microscopy (HRTEM), electron diffraction (ED), magnetization studies and Mössbauer spectroscopy. The CuxFe3-xO4 particles are superparamagnetic at room temperature 300 K with a saturation magnetization of 30.5 emu g-1. Below their blocking temperature of 60 K, they become ferrimagnetic, and at 5 K they show a coercive field of 122 Oe and a saturation magnetization of 36.1 emu g-1. The Cu xFe3-xO4 nanoparticles were functionalized using a hydrophilic multifunctional polymeric ligand containing PEG(800) groups and a fluorophore. By virtue of their magnetic properties these nanoparticles may serve as contrast enhancing agents for magnetic resonance imaging (MRI).

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