Magnetic poly(glycidyl methacrylate) microspheres containing maghemite prepared by emulsion polymerization

Pollert, E.; Knı́žek, K.; Maryško, M.; Závěta, K.; Lančok, Adriana; Boháček, Jaroslav; Horák, Daniel; Babič, Michal

doi:10.1016/j.jmmm.2006.03.069

Cited by 59 publications

(31 citation statements)

References 19 publications

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“…From the magnetization curves measured in the vicinity of room temperature, it was obvious [4] that our particles were mostly in the superparamagnetic state. In order to get more detailed information about the transition, we measured the temperature dependences of M ZFC and M FC magnetizations from 5 K to 300 K. Cooling for the latter magnetization was carried out in the field used during the measurements of M ZFC in the preceding run.…”

Section: Magnetic Measurementsmentioning

confidence: 96%

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Superparamagnetic properties of γ-Fe2O3 particles: Mössbauer spectroscopy and d.c. magnetic measurements

et al. 2006

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Particles of Fe oxide were prepared by chemical coprecipitation and their sizes were shown by TEM and confirmed by XRD to be in the range of 5 nm. The Mössbauer spectra at 120 K clearly indicated the absence of magnetite and presence of the maghemite (γ-Fe2O3) phase. We studied the transition of the system to superparamagnetic behaviour, which strongly depends on the relevant time window amounting to ∼ 10 −7 s for Mössbauer spectroscopy of 57 Fe and units of seconds for d.c. magnetic measurements. From the temperature dependences of magnetic moments of zero-field-cooled (ZFC)) and field-cooled (FC) samples, the distributions of blocking temperatures were determined. The comparison of the transition temperatures derived from these two types of measurements gave an independent estimate for the pre-exponential factor and the energy barrier and thus magnetocrystalline anisotropy in an order-of-magnitude agreement with the published data for bulk γ-Fe2O3.PACS : 61.46.Df, 75.30.Gw

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Section: Magnetic Measurementsmentioning

confidence: 96%

“…malignant cells by hyperthermia [3]. The present paper is actually a more detailed part of a study [4] of a system of organic microspheres containing magnetic nanoparticles, centred here on the behaviour of the "pure" iron-oxide particles.…”

Section: Introductionmentioning

confidence: 99%

Superparamagnetic properties of γ-Fe2O3 particles: Mössbauer spectroscopy and d.c. magnetic measurements

et al. 2006

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“…The magnetic separation techniques, as expected, requires magnetic particles to satisfy some vital features such as colloidal sustainability, equality in size, low poly dispersity index, the high and equal amount of magnetite content, superparamagnetic behavior, and effective surface functional groups to interact with active biological ligands (15). There is a variety of methods to synthesize magnetic polymeric spheres like emulsion (16) and multistep swelling polymerization (17), solvent evaporation (18), etc. In contrast to these methods, providing very complex or broad polydispersity index, the dispersion polymerization has been suggested as an alternative method to synthesize micron-sized magnetic particles (19).…”

Section: Introductionmentioning

confidence: 99%

Characterization of Magnetic Polymeric Microparticles

Köse¹

2016

J. Turk. Chem. Soc., Sect. A: Chem.

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Abstract:The separation process is very important in a variety of scientific fields, especially in biochemistry and biotechnology. The separation performance of a method can be determined by the separation time and the purity of the separated molecule, which is directly proportional with the ligand chosen for the target molecule. The separation time is actually a very important step for the cost and the time-dependent analysis, especially in medical applications. Magnetic separation is a very advantageous technique because it eliminates the time-consuming sample preparation and centrifugation steps. However, the magnetic performance of adsorbent may not be strong enough to respond the magnetic force applied externally. Therefore, in nanoparticle studies, magnetic performance of nanoparticles is highly important. In this study, the magnetic performance of polymeric microparticles synthesized using different magnetic cores (Fe2O3 & Fe3O4, Fe & Ni, Ni & Co, Fe & Ni & Co) with a solid support, HEMA (2-hydroxyethylmethacrylate), and a functional monomer, AdeM (adenine methacrylate), were compared. Some other properties such as size, zeta potential, surface morphology, etc. were also studied.

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“…[13], Talelli at al. [14]), emulsion polymerization (Ramírez et al [15], Wormuth [16], Pollert et al [17]) or solvent extraction/evaporation method (Feczkó at al. [18]).…”

Section: Introductionmentioning

confidence: 99%

Encapsulation of human serum albumin in submicrometer magnetic poly(lactide-co-glycolide) particles as a model system for targeted drug delivery

et al. 2013

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Two types of iron oxide nanoparticles were synthesized by coprecipitation of Fe(II) and Fe(III) chlorides: water-dispersible γ-Fe 2 O 3 and organic solvent-dispersible oleic acid-coated Fe 3 O 4 particles. The nanoparticles, together with human serum albumin (HSA) serving as a model for a protein-type drug, were then incorporated in poly(lactide-co-glycolide) (PLGA) particles using double emulsion solvent evaporation technique. Morphology, size and particle size distribution of the resulting particles was analyzed by electron microscopy and dynamic light scattering. Iron oxide and HSA encapsulating efficiency was determined by Prussian Blue staining and micro-BCA assay, respectively.

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Magnetic poly(glycidyl methacrylate) microspheres containing maghemite prepared by emulsion polymerization

Cited by 59 publications

References 19 publications

Superparamagnetic properties of γ-Fe2O3 particles: Mössbauer spectroscopy and d.c. magnetic measurements

Superparamagnetic properties of γ-Fe2O3 particles: Mössbauer spectroscopy and d.c. magnetic measurements

Characterization of Magnetic Polymeric Microparticles

Encapsulation of human serum albumin in submicrometer magnetic poly(lactide-co-glycolide) particles as a model system for targeted drug delivery

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