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A biocompatible magnetic film: synthesis and characterization.

Chatterjee J, Haik Y, Chen CJ - Biomagn Res Technol (2004)

Bottom Line: Nanosized iron oxide particles (gamma-Fe2O3, ~7 nm) have been used to produce the magnetic gel.The iron oxide particles are superparamagnetic and the gel film also showed superparamagnetic behavior.CONCLUSION: Magnetic gel made out of crosslinked magnetic nanoparticles in the polymer network was found to be stable and possess the magnetic properties of the nanoparticles.

View Article: PubMed Central - HTML - PubMed

Affiliation: Center for Nanomagnetics and Biotechnology, Florida State University, Tallahassee, Florida 32310, USA. haik@eng.fsu.edu

ABSTRACT
BACKGROUND: Biotechnology applications of magnetic gels include biosensors, targeted drug delivery, artificial muscles and magnetic buckles. These gels are produced by incorporating magnetic materials in the polymer composites. METHODS: A biocompatible magnetic gel film has been synthesized using polyvinyl alcohol. The magnetic gel was dried to generate a biocompatible magnetic film. Nanosized iron oxide particles (gamma-Fe2O3, ~7 nm) have been used to produce the magnetic gel. RESULTS: The surface morphology and magnetic properties of the gel films were studied. The iron oxide particles are superparamagnetic and the gel film also showed superparamagnetic behavior. CONCLUSION: Magnetic gel made out of crosslinked magnetic nanoparticles in the polymer network was found to be stable and possess the magnetic properties of the nanoparticles.

No MeSH data available.


Hysteresis plot for PVA magnetic film
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Figure 4: Hysteresis plot for PVA magnetic film

Mentions: The magnetic property of the gel was measured by a Superconducting Quantum Interference Device (MPMS 5, Quantum Design). Magnetization measurement was done at 300 K and at 5 K. A small piece of PVA magnetic film was placed in a gelatin capsule and inserted in the SQUID. There is almost no remnant magnetization at 300 K but at 5 K, hysteresis loop was observed (Fig 4). This shows that the superparamagnetic nature of the nanosized maghemite particles [7, 8] did not change in presence of the polymer network and the composite film itself behaved as a superparamagnetic material.


A biocompatible magnetic film: synthesis and characterization.

Chatterjee J, Haik Y, Chen CJ - Biomagn Res Technol (2004)

Hysteresis plot for PVA magnetic film
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC373455&req=5

Figure 4: Hysteresis plot for PVA magnetic film
Mentions: The magnetic property of the gel was measured by a Superconducting Quantum Interference Device (MPMS 5, Quantum Design). Magnetization measurement was done at 300 K and at 5 K. A small piece of PVA magnetic film was placed in a gelatin capsule and inserted in the SQUID. There is almost no remnant magnetization at 300 K but at 5 K, hysteresis loop was observed (Fig 4). This shows that the superparamagnetic nature of the nanosized maghemite particles [7, 8] did not change in presence of the polymer network and the composite film itself behaved as a superparamagnetic material.

Bottom Line: Nanosized iron oxide particles (gamma-Fe2O3, ~7 nm) have been used to produce the magnetic gel.The iron oxide particles are superparamagnetic and the gel film also showed superparamagnetic behavior.CONCLUSION: Magnetic gel made out of crosslinked magnetic nanoparticles in the polymer network was found to be stable and possess the magnetic properties of the nanoparticles.

View Article: PubMed Central - HTML - PubMed

Affiliation: Center for Nanomagnetics and Biotechnology, Florida State University, Tallahassee, Florida 32310, USA. haik@eng.fsu.edu

ABSTRACT
BACKGROUND: Biotechnology applications of magnetic gels include biosensors, targeted drug delivery, artificial muscles and magnetic buckles. These gels are produced by incorporating magnetic materials in the polymer composites. METHODS: A biocompatible magnetic gel film has been synthesized using polyvinyl alcohol. The magnetic gel was dried to generate a biocompatible magnetic film. Nanosized iron oxide particles (gamma-Fe2O3, ~7 nm) have been used to produce the magnetic gel. RESULTS: The surface morphology and magnetic properties of the gel films were studied. The iron oxide particles are superparamagnetic and the gel film also showed superparamagnetic behavior. CONCLUSION: Magnetic gel made out of crosslinked magnetic nanoparticles in the polymer network was found to be stable and possess the magnetic properties of the nanoparticles.

No MeSH data available.