Production and characterization of long-term stable superparamagnetic iron oxide-shell silica-core nanocomposites

Angelika Nistler; Carolin Hartmann; Christine Rümenapp; Matthias Opel; Bernhard Gleich; Natalia P. Ivleva; Reinhard Niessner; Michael Seidel

doi:10.1016/j.jmmm.2017.07.005

Production and characterization of long-term stable superparamagnetic iron oxide-shell silica-core nanocomposites

Angelika Nistler, Carolin Hartmann, Christine Rümenapp, Matthias Opel, Bernhard Gleich, Natalia P. Ivleva, Reinhard Niessner, Michael Seidel

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

13 Scopus citations

Abstract

Methods improving the chemical and physical stability of magnetic nanoparticles are important in diverse research disciplines such as catalysis, magnetic resonance imaging, biomedicine, and bioseparation. It is essential that defined nanomaterial characteristics remain unchanged from the start of the nanoparticle production to their final application. A simple, fast and reliable strategy based on a thermal decomposition approach was established to design highly and uniformly loaded iron oxide-shell silica-core nanocomposites. They are formed by maghemite nanoparticles (8.4 ± 1.0 nm) uniformly deposited on mesoporous silica nanoparticles (381 nm ± 111 nm). Their magnetic properties as well as chemical, and mechanical stability were verified by SQUID magnetometry, Raman microspectroscopy, and electron microscopy (SEM and TEM), respectively. The produced superparamagnetic nanocomposites were stable over several months. The coating with organosilanes enables the transfer from nonpolar to aqueous phase which makes the magnetic nanocomposites also applicable for life sciences.

Original language	English
Pages (from-to)	497-503
Number of pages	7
Journal	Journal of Magnetism and Magnetic Materials
Volume	442
DOIs	https://doi.org/10.1016/j.jmmm.2017.07.005
State	Published - 15 Nov 2017

Keywords

In situ synthesis
Long-term stability
Magnetic nanocomposites
Raman microspectroscopy
SQUID magnetometry
Superparamagnetism

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10.1016/j.jmmm.2017.07.005

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title = "Production and characterization of long-term stable superparamagnetic iron oxide-shell silica-core nanocomposites",

abstract = "Methods improving the chemical and physical stability of magnetic nanoparticles are important in diverse research disciplines such as catalysis, magnetic resonance imaging, biomedicine, and bioseparation. It is essential that defined nanomaterial characteristics remain unchanged from the start of the nanoparticle production to their final application. A simple, fast and reliable strategy based on a thermal decomposition approach was established to design highly and uniformly loaded iron oxide-shell silica-core nanocomposites. They are formed by maghemite nanoparticles (8.4 ± 1.0 nm) uniformly deposited on mesoporous silica nanoparticles (381 nm ± 111 nm). Their magnetic properties as well as chemical, and mechanical stability were verified by SQUID magnetometry, Raman microspectroscopy, and electron microscopy (SEM and TEM), respectively. The produced superparamagnetic nanocomposites were stable over several months. The coating with organosilanes enables the transfer from nonpolar to aqueous phase which makes the magnetic nanocomposites also applicable for life sciences.",

keywords = "In situ synthesis, Long-term stability, Magnetic nanocomposites, Raman microspectroscopy, SQUID magnetometry, Superparamagnetism",

author = "Angelika Nistler and Carolin Hartmann and Christine R{\"u}menapp and Matthias Opel and Bernhard Gleich and Ivleva, {Natalia P.} and Reinhard Niessner and Michael Seidel",

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year = "2017",

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day = "15",

doi = "10.1016/j.jmmm.2017.07.005",

language = "English",

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T1 - Production and characterization of long-term stable superparamagnetic iron oxide-shell silica-core nanocomposites

AU - Nistler, Angelika

AU - Hartmann, Carolin

AU - Rümenapp, Christine

AU - Opel, Matthias

AU - Gleich, Bernhard

AU - Ivleva, Natalia P.

AU - Niessner, Reinhard

AU - Seidel, Michael

PY - 2017/11/15

Y1 - 2017/11/15

N2 - Methods improving the chemical and physical stability of magnetic nanoparticles are important in diverse research disciplines such as catalysis, magnetic resonance imaging, biomedicine, and bioseparation. It is essential that defined nanomaterial characteristics remain unchanged from the start of the nanoparticle production to their final application. A simple, fast and reliable strategy based on a thermal decomposition approach was established to design highly and uniformly loaded iron oxide-shell silica-core nanocomposites. They are formed by maghemite nanoparticles (8.4 ± 1.0 nm) uniformly deposited on mesoporous silica nanoparticles (381 nm ± 111 nm). Their magnetic properties as well as chemical, and mechanical stability were verified by SQUID magnetometry, Raman microspectroscopy, and electron microscopy (SEM and TEM), respectively. The produced superparamagnetic nanocomposites were stable over several months. The coating with organosilanes enables the transfer from nonpolar to aqueous phase which makes the magnetic nanocomposites also applicable for life sciences.

AB - Methods improving the chemical and physical stability of magnetic nanoparticles are important in diverse research disciplines such as catalysis, magnetic resonance imaging, biomedicine, and bioseparation. It is essential that defined nanomaterial characteristics remain unchanged from the start of the nanoparticle production to their final application. A simple, fast and reliable strategy based on a thermal decomposition approach was established to design highly and uniformly loaded iron oxide-shell silica-core nanocomposites. They are formed by maghemite nanoparticles (8.4 ± 1.0 nm) uniformly deposited on mesoporous silica nanoparticles (381 nm ± 111 nm). Their magnetic properties as well as chemical, and mechanical stability were verified by SQUID magnetometry, Raman microspectroscopy, and electron microscopy (SEM and TEM), respectively. The produced superparamagnetic nanocomposites were stable over several months. The coating with organosilanes enables the transfer from nonpolar to aqueous phase which makes the magnetic nanocomposites also applicable for life sciences.

KW - In situ synthesis

KW - Long-term stability

KW - Magnetic nanocomposites

KW - Raman microspectroscopy

KW - SQUID magnetometry

KW - Superparamagnetism

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DO - 10.1016/j.jmmm.2017.07.005

M3 - Article

AN - SCOPUS:85025480020

SN - 0304-8853

VL - 442

SP - 497

EP - 503

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

ER -

Production and characterization of long-term stable superparamagnetic iron oxide-shell silica-core nanocomposites

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Keywords

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