Magnetic resonance study of maghemite-based magnetic fluid

Figueiredo, Leandro Corrêa; Lacava, B. M.; Neto, K. Skeff; Pelegrini, F.; Morais, P.C.

doi:10.1016/j.jmmm.2008.02.069

Cited by 10 publications

(5 citation statements)

References 18 publications

(19 reference statements)

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“…10 nm (vide supra), the value of K a can be estimated as 4.3 × 10 4 J/m 3 , a value similar to that found in the literature (4.5 × 10 4 J/m 3 ) 33 and comparable to that obtained for bulk γ-Fe 2 O 3 (4.7 × 10 4 J/m 3 ). 34 Such close anisotropy values for bulk material and nanoparticles could suggest that shape, strain, and surface anisotropies are negligible as compared to magnetocrystalline anisotropy. 35 However, pertinent conclusions can hardly be drawn as the value obtained by us resulted from several assumptions and has to be regarded as estimation only.…”

Section: Resultsmentioning

confidence: 98%

Adsorption of Doxorubicin onto Citrate-Stabilized Magnetic Nanoparticles

et al. 2012

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We have synthesized citric-acid-stabilized magnetic nanoparticles with very good magnetization behavior and relatively low contribution from shape and surface magnetic anisotropies. In this work, we report also on a simple adsorption of doxorubicin onto the surface of these nanoferrites that can provide a facile preparation process for potential drug carriers. To estimate the amount of adsorbed doxorubicin, we propose a novel method utilizing a ternary system for the determination of interactions between drug and citric-acid-stabilized nanoparticles. The Gibbs free enthalpy of adsorption was determined from Henry's isotherm that represents the drug adsorption profile within the studied concentration range. The estimated value seems to be promising for the preparation of drug-loaded nanoparticles solely by means of the adsorption process. Additional encapsulation of doxorubicin-loaded nanoparticles in an inert polypyrrole microvessel might provide a protective surrounding for drug molecules. In our opinion, understanding the physical interactions between doxorubicin and nanoparticles might be a key factor governing drug release and overall pharmacodynamics.

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Section: Resultsmentioning

confidence: 98%

Adsorption of Doxorubicin onto Citrate-Stabilized Magnetic Nanoparticles

et al. 2012

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“…Maghemite (γ-Fe 2 O 3 ) nanoparticles (NPs), suspended as low-pH ionic magnetic fluid containing 2.3 × 10 17 particles/mL, 16 were dispersed in aqueous medium containing bovine serum albumin (BSA) in order to produce the MAN sample, following the protocol already described in the literature. 17 MAN was prepared following the heat denaturation method at 100°C of an aqueous solution containing bovine serum albumin (BSA) under mechanical stirring at 13,000 rpm for 20 minutes.…”

Section: Magnetic Nanospheresmentioning

confidence: 99%

Carbon Nanotube-Mediated Wireless Cell Permeabilization: Drug and Gene Uptake

et al. 2011

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“…The value of Δ N calculated from Equation is approximately 0.10 for GO–Fe 3 O 4 . Although this particular approach to orientation dependence of the resonance field in FMR experiment seems adequate for our sample, more general one was previously reported …”

Section: Resultsmentioning

confidence: 76%

Magnetic Properties of Poly(trimethylene terephthalate‐block‐Poly(tetramethylene oxide) Copolymer Nanocomposites Reinforced by Graphene Oxide–Fe₃O₄ Hybrid Nanoparticles

Szymczyk

Paszkiewicz

Typek

et al. 2019

Physica Status Solidi (a)

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Thermoplastic elastomeric nanocomposites based on poly(trimethylene terephthalate‐block‐poly(tetramethylene oxide) copolymer (PTT‐PTMO) and graphene oxide (GO)–Fe3O4 nanoparticles hybrid are prepared by in situ polymerization. Superparamagnetic GO–Fe3O4 hybrid nanoparticles before introducing to elastomeric matrix are characterized by X‐ray photoelectron spectroscopy (XPS), X‐ray diffraction (XRD), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). The effect of loading (0.3 and 0.5 wt%) of GO–Fe3O4 nanoparticle hybrid on the phase structure, tensile, and magnetic properties of synthesized nanocomposites is investigated. The phase structure of nanocomposites is evaluated by differential scanning calorimetry (DSC) and dynamic mechanical thermal analysis (DMTA). Dispersion of GO–Fe3O4 nanoparticles in elastomeric matrix is evaluated by transmission electron microscopy (TEM). Magnetic properties of GO–Fe3O4 nanoparticle hybrid and nanocomposites with their content are characterized using two different techniques: direct current superconducting quantum interference device (dc SQUID) magnetization measurements as a function of temperature (from 2 to 300 K) and external magnetic field and ferromagnetic resonance (FMR) at microwave frequency.

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Magnetic resonance study of maghemite-based magnetic fluid

Cited by 10 publications

References 18 publications

Adsorption of Doxorubicin onto Citrate-Stabilized Magnetic Nanoparticles

Adsorption of Doxorubicin onto Citrate-Stabilized Magnetic Nanoparticles

Carbon Nanotube-Mediated Wireless Cell Permeabilization: Drug and Gene Uptake

Magnetic Properties of Poly(trimethylene terephthalate‐block‐Poly(tetramethylene oxide) Copolymer Nanocomposites Reinforced by Graphene Oxide–Fe₃O₄ Hybrid Nanoparticles

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Magnetic resonance study of maghemite-based magnetic fluid

Cited by 10 publications

References 18 publications

Adsorption of Doxorubicin onto Citrate-Stabilized Magnetic Nanoparticles

Adsorption of Doxorubicin onto Citrate-Stabilized Magnetic Nanoparticles

Carbon Nanotube-Mediated Wireless Cell Permeabilization: Drug and Gene Uptake

Magnetic Properties of Poly(trimethylene terephthalate‐block‐Poly(tetramethylene oxide) Copolymer Nanocomposites Reinforced by Graphene Oxide–Fe3O4 Hybrid Nanoparticles

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Product

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About

Magnetic Properties of Poly(trimethylene terephthalate‐block‐Poly(tetramethylene oxide) Copolymer Nanocomposites Reinforced by Graphene Oxide–Fe₃O₄ Hybrid Nanoparticles