Preparation of monodisperse magnetite nanoparticles under mild conditions

Wen, Xian; Yang, Juping; He, Bin; Gu, Zhongwei

doi:10.1016/j.cap.2007.09.003

Cited by 93 publications

(54 citation statements)

References 28 publications

(52 reference statements)

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“…The observed spectra are in agreement with those previously published by various investigators on these systems [30][31][32]. Sharp absorption lines are observed at characteristic wave numbers associated with various stretching modes present in the surfactant molecules.…”

Section: Ftir Spectroscopysupporting

confidence: 91%

Magnetization and Specific Absorption Rate Studies of Ball-Milled Iron Oxide Nanoparticles for Biomedicine

Burnham

Dollahon

et al. 2013

Journal of Nanoparticles

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Comparative studies are presented of iron oxide nanoparticles in the 7-15 nm average diameter range ball milled in hexane in the presence of oleic acid. Transmission electron microscopy identified spherical particles of decreasing size as milling time and/or surfactant concentration increased. Micromagnetic characterization via Mössbauer spectroscopy at room temperature yielded broadened magnetic spectroscopic signatures, while macromagnetic characterization via vibrating sample magnetometry of 7-8 nm diameter particles showed largely superparamagnetic behavior at room temperature and hysteretic at 2 K. Zero-field and field-cooled magnetization curves exhibited a broad maximum at ∼215 K indicating the presence of strong interparticle magnetic interactions. The specific absorption rates of ferrofluids based on these nanoparticle preparations were measured in order to test their efficacies as hyperthermia agents.

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Section: Ftir Spectroscopysupporting

confidence: 91%

Magnetization and Specific Absorption Rate Studies of Ball-Milled Iron Oxide Nanoparticles for Biomedicine

Burnham

Dollahon

et al. 2013

Journal of Nanoparticles

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“…Figure 5 shows the infrared spectra of sodium oleate. The sodium oleate spectra show broad bands at 1561 and 1446 cm −1 attributed to the asymmetric and symmetric stretching vibrations of the COO − group in sodium oleate [25]. The band at 3008 cm −1 is characteristic of the =C-H stretching vibration.…”

Section: Ftir Analysismentioning

confidence: 99%

The Flotation of Kyanite and Sillimanite with Sodium Oleate as the Collector

et al. 2016

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Kyanite and sillimanite are two polymorphic minerals with the same formula of Al 2 SiO 5 , but different crystal structures. Despite their high economic values, selectively recovering them by flotation is a challenge. In this study, the flotation behaviors of the two minerals with sodium oleate as the collector were examined at different pH conditions. Zeta potential measurement, infrared spectroscopic measurement, chemical speciation and X-ray photoelectron spectroscopy measurement were conducted to identify the underpinning mechanisms. It is found that the flotation behavior of both minerals is different under the same flotation condition. The flotation recovery of sillimanite is much higher than that of kyanite in the presence of the collector sodium oleate. Sodium oleate adsorbs onto the surfaces of kyanite and sillimanite mainly through the chemical interaction of the ionic-molecular dimers with aluminum atoms at pH 8.0. The higher sillimanite flotation recovery between the two minerals is related to the higher electrostatic charge densities of the aluminum atoms in six-fold coordination, which leads to the higher collector adsorption.

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“…When the size of Fe 3 O 4 , nanoparticles is very small, the size of single-magnetic domain is equal to that of each single particle. Fe 3 O 4 nanoparticles usually exhibit superparamagnetic property [27], therefore, their fabrication is attracting a lot of interest.…”

Section: Introductionmentioning

confidence: 99%

Ultrafine Magnetite Nanopowder: Synthesis, Characterization, and Preliminary Use as Filler of Polymethylmethacrylate Nanocomposites

Russo

Acierno

Palomba

et al. 2012

Journal of Nanotechnology

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Magnetite (Fe 3 O 4 ) nanoparticles prepared by microwave-assisted hydrothermal synthesis have been characterized in terms of morphological and structural features. Electron micrographs collected in both scanning (SEM) and transmission (TEM) modes and evaluations of X-ray powder diffraction (XRD) patterns have indicated the achievement of a monodispersed crystallite structure with particles having an average size around 15-20 nm. Structural investigations by Micro-Raman spectroscopy highlighted the obtainment of magnetite nanocrystals with a partial surface oxidation to maghemite (γ-Fe 3 O 4 ). Preliminary attention has been also paid to the use of these magnetite nanoparticles as filler for a commercial polymethylmethacrylate resin. Hybrid formulations containing up to 3 wt% of nanoparticles were prepared by melt blending and characterized by calorimetric and thermogravimetric tests. For sake of comparison, same formulations containing commercial Fe 3 O 4 nanoparticles are also reported. Calorimetric characterization indicates an increase of both glass transition temperature and thermal stability of the nanocomposite systems when loaded with the synthesized magnetite nanoparticles rather then loaded with the same amount of commercial Fe 3 O 4 . This first observation represents just one aspect of the promising potentiality offered by the novel magnetic nanoparticles when mixed with PMMA.

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Preparation of monodisperse magnetite nanoparticles under mild conditions

Cited by 93 publications

References 28 publications

Magnetization and Specific Absorption Rate Studies of Ball-Milled Iron Oxide Nanoparticles for Biomedicine

Magnetization and Specific Absorption Rate Studies of Ball-Milled Iron Oxide Nanoparticles for Biomedicine

The Flotation of Kyanite and Sillimanite with Sodium Oleate as the Collector

Ultrafine Magnetite Nanopowder: Synthesis, Characterization, and Preliminary Use as Filler of Polymethylmethacrylate Nanocomposites

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