Synthesis and magnetic properties of the γ-Fe2O3/poly-(methyl methacrylate)-core/shell nanoparticles

Ninjbadgar, Tsedev; Yamamoto, Satoshi; Fukuda, Takeshi

doi:10.1016/j.solidstatesciences.2003.11.009

Cited by 61 publications

(26 citation statements)

References 40 publications

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“…3), therefore we can infer that the doublet measured at RT from composites S3 and S6 corresponds to superparamagnetic maghemite particles. Fitted QS values are in agreement with values reported for superparamagnetic maghemite [14] and not with those reported for superparamagnetic magnetite [15]. S5 is so diluted that no ME could be recorded.…”

Section: Resultssupporting

confidence: 78%

Mössbauer effect phase determination in iron oxide–polyaniline nanocomposites

Aphesteguy¹,

Jacobo²,

Torres

et al. 2007

Hyperfine Interact

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Mössbauer effect spectroscopy and thermal analysis techniques were applied to characterize polyaniline composites successfully synthesized by embedding Fe oxide nanoparticles (about 10-13 nm) in a polymeric matrix in the presence of dodecyl benzene sulfonic acid and HCl (dopant). Thermal techniques provided quantitative information on iron oxide content and on polyaniline stability and transformations. Mössbauer results indicated that for the whole studied composition range, 3.4 to 100 iron oxide wt.%, composites hold maghemite particles. A preliminary study of the conductivity of the nanocomposites was performed. The largest conductivity was observed for a 8 wt.% maghemite composite where all particles are magnetically unblocked at room temperature within the Mössbauer time window.

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Section: Resultssupporting

confidence: 78%

Mössbauer effect phase determination in iron oxide–polyaniline nanocomposites

Aphesteguy¹,

Jacobo²,

Torres

et al. 2007

Hyperfine Interact

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“…The second one is the falling of magnetic properties especially M s of coated nanoparticles as a reason for the utilization of the large nonmagnetic molecules (polymers) as coating agents and thereby the augmentation of shell (polymer) to core (magnetite) diameter ratio [216–221]. According to these facts, the polymers are the appropriate coating for particles with high M s or matrix structures (which contained many magnetic particles in polymer matrix).…”

Section: Surface Treatmentsmentioning

confidence: 99%

“…Polymer coating process can be done in two different methods including two-pot and in situ methods. The particles coating is carried out after synthesis process in two-pot method, while polymers can play critical roles as microcarriers for particles synthesis in one-pot method; thus, although the in situ methods usually have some complicities, they caused more suitable properties like particle dispersity, particles size, and even saturation magnetization of particles [216–221]. …”

Section: Surface Treatmentsmentioning

confidence: 99%

Perspective of Fe₃O₄Nanoparticles Role in Biomedical Applications

Ghazanfari

Kashefi

Shams

et al. 2016

Biochemistry Research International

189

100

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In recent years, although many review articles have been presented about bioapplications of magnetic nanoparticles by some research groups with different expertise such as chemistry, biology, medicine, pharmacology, and materials science and engineering, the majority of these reviews are insufficiently comprehensive in all related topics like magnetic aspects of process. In the current review, it is attempted to carry out the inclusive surveys on importance of magnetic nanoparticles and especially magnetite ones and their required conditions for appropriate performance in bioapplications. The main attentions of this paper are focused on magnetic features which are less considered. Accordingly, the review contains essential magnetic properties and their measurement methods, synthesis techniques, surface modification processes, and applications of magnetic nanoparticles.

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“…However, at 300 K the nanoparticle shell layer is already represented by a doublet, as the exchange interaction related to it is much lower than the exchange interaction related to the nanoparticle core. Further, the higher quadrupole splitting value associated to the template is more likely related to the effect of the nanoparticle surface interaction with the hosting template, as discussed in the literature [24,25].…”

Section: Resultsmentioning

confidence: 89%

Nanoscaled biocompatible magnetic drug-delivery system: preparation and characterization

et al. 2009

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Biocompatible magnetic nanocomposite consisting of bovine serum albumin-based nanosized spheres hosting maghemite nanoparticle has been investigated by Mössbauer spectroscopy, X-ray diffraction, and electron microscopy. The 77 K Mössbauer spectrum was curve-fitted to two sextets whereas one doublet plus one sextet was used to fit the 300 K Mössbauer spectrum. The temperature evolution of the hyperfine parameters indicated two Mössbauer components; one associated to the core maghemite nanoparticle and the other associated to the maghemite surface shell. The 300 K quadrupole splitting value indicated strong interaction between the surface of the maghemite nanoparticle and the hosting template.

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Synthesis and magnetic properties of the γ-Fe2O3/poly-(methyl methacrylate)-core/shell nanoparticles

Cited by 61 publications

References 40 publications

Mössbauer effect phase determination in iron oxide–polyaniline nanocomposites

Mössbauer effect phase determination in iron oxide–polyaniline nanocomposites

Perspective of Fe₃O₄Nanoparticles Role in Biomedical Applications

Nanoscaled biocompatible magnetic drug-delivery system: preparation and characterization

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Synthesis and magnetic properties of the γ-Fe2O3/poly-(methyl methacrylate)-core/shell nanoparticles

Cited by 61 publications

References 40 publications

Mössbauer effect phase determination in iron oxide–polyaniline nanocomposites

Mössbauer effect phase determination in iron oxide–polyaniline nanocomposites

Perspective of Fe3O4Nanoparticles Role in Biomedical Applications

Nanoscaled biocompatible magnetic drug-delivery system: preparation and characterization

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Perspective of Fe₃O₄Nanoparticles Role in Biomedical Applications