Magnetic Fluids

Blums, Elmars; Cēbers, A.; Maiorov, Mikael M.

doi:10.1515/9783110807356

Cited by 267 publications

(301 citation statements)

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“…40 In the sample obtained at longer growth time the XRD data indicate a peak sharpening due to the crystal growth, and that bcc-Fe is present together with wüstite and magnetite, the latter being the main phase. This result indicates that, in agreement with the phase diagram, 37 wüstite undergoes dismutation giving rise to Fe and Fe 3 O 4 .…”

Section: Crystal Structure and Phase Controlsupporting

confidence: 81%

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The Concept of Delayed Nucleation in Nanocrystal Growth Demonstrated for the Case of Iron Oxide Nanodisks

et al. 2006

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RECEIVED DATE (to be automatically inserted after your manuscript is accepted if required according to the journal that you are submitting your paper to) TITLE RUNNING HEAD. Monodisperse Iron Oxide Nanodisks by Delayed Nucleation 2 ABSTRACT A comprehensive study of iron oxide nanocrystal growth through non-hydrolitic, surfactantmediated thermal reaction of iron pentacarbonyl and an oxidizer has been conducted, which includes size control, anisotropic shape evolution, and crystallographic phase transition of monodisperse iron oxide colloidal nanocrystals. The reaction was monitored by in situ UV-Vis spectroscopy taking advantage of the color change accompanying the iron oxide colloid formation allowing measurement of the induction time for nucleation. Features of the synthesis such as the size control and reproducibility are related to the occurrence of the observed delayed nucleation process. As a separate source of iron and oxygen is adopted, phase control could also be achieved by sequential injections of oxidizer.3

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Section: Crystal Structure and Phase Controlsupporting

confidence: 81%

“…It has been reported that amines bind less strongly than carboxylic acids of the same carbon chain length. 36,37 We have therefore performed the decomposition of Fe(CO) 5 in the presence of dodecylamine as surfactant, recording an induction time of a few minutes.…”

Section: Pathway Of Formation Of the Nanocrystalsmentioning

confidence: 99%

The Concept of Delayed Nucleation in Nanocrystal Growth Demonstrated for the Case of Iron Oxide Nanodisks

et al. 2006

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“…In this work we extend the results of [14] to the case of finite- composite materials by considering the magnetic interparticle interaction, which becomes significant on increase of . We will consider the competition between the magnetic energy and the interfacial energy.…”

Section: Theorymentioning

confidence: 94%

“…Theoretical analysis of magnetic permeability of a ferrofluid with drop-like aggregates in effective medium approach is given in [14]. Wagner's formula valid in a limit of low concentrations was used for calculation of permeability.…”

Section: Theorymentioning

confidence: 99%

Drops deformation and magnetic permeability of a ferrofluid emulsion

Zakinyan

Dikansky

2011

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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To cite this version:Arthur Zakinyan, Yury Dikansky. Drops deformation and magnetic permeability of a ferrofluid emulsion. Colloids and Surfaces A: Physicochemical and Engineering Aspects, Elsevier, 2011, 380 (1- Abstract. In the paper the novel soft magnetic composite system is investigated. A ferrofluid emulsion studied demonstrates the strong magnetic properties which are atypical for commonly known emulsions. Interaction of ferrofluid emulsions with a magnetic field is considered. Structural transformations in these media, such as deformation of emulsion microdroplets and emulsion inversion, are studied. The changes in the relative permeability of emulsion associated with structural transformations are investigated. The theory of the observed phenomena is developed, and the feasibility of effectively controlling the magnetic properties of ferrofluid emulsions by applying a magnetic field is demonstrated.

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“…The linear magnetisation is a reasonable assumption in the region of weak fields [4], whereas nonlinear magnetisation is a necessary requirement for the problem modeling in a wide range of field intensities. If we assume that the drop shape is spheroid then we can determine the drop elongation for every field intensity by applying a theoretical approach, so-called the virial method [1]. The corresponding dependence is drawn by the solid line.…”

Section: Numerical Resultsmentioning

confidence: 99%