Static magneto optical birefringence of new Electric Double Layered Magnetic Fluids

Depeyrot, J.; Silva, G. J. da; Alves, Carlúcio Roberto; Sousa, Edmundo; Magalhães, Marcos Vinícius Silva; Neto, A. M. Figueiredo; Tourinho, F.A.

doi:10.1590/s0103-97332001000300008

Cited by 11 publications

(8 citation statements)

References 11 publications

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“…Thanks to a protective surface treatment, the coprecipitated nanoparticles are then dispersed in an acidic medium. The resulting magnetic liquids present, at room temperature, gigantic magnetic [14] and magneto-optical [15] responses when an external field is applied. At each step of the synthesis, the Fe 3 + and Zn 2 + contents in the nanoparticles are determined by inductively coupled plasma atomic emission.…”

Section: Chemical Synthesismentioning

confidence: 99%

ZnFe2O4 nanoparticles for ferrofluids: A combined XANES and XRD study

Gomes

Azevedo

Depeyrot

et al. 2011

Journal of Magnetism and Magnetic Materials

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Section: Chemical Synthesismentioning

confidence: 99%

ZnFe2O4 nanoparticles for ferrofluids: A combined XANES and XRD study

Gomes

Azevedo

Depeyrot

et al. 2011

Journal of Magnetism and Magnetic Materials

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“…They also show many field independent properties such as zero field birefringence. [3][4][5][6][7] An ideal optical limiter should be transparent to low energy laser pulses and opaque at high energies, so that it can protect human eyes and optical sensors from intense laser radiation. Several organic and inorganic compounds 8 and metal and semiconductor nanoparticles [9][10][11] are found to exhibit good optical limiting properties.…”

mentioning

confidence: 99%

An optical limiter based on ferrofluids

Nair

Thomas

Sandeep

et al. 2008

Applied Physics Letters

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We report an optical limiter based on ferrofluids which has a very high shelf life and remarkable thermal stability, which are important requirements for sustainable use with intense lasers. The colloidal suspensions contain nanosized particles of approximately 80 Å diameter, with a number density of the order of 10 22 / m 3. The nonlinear optical transmission of the samples is studied using nanosecond and femtosecond laser pulses. Excited state absorption phenomena contribute to enhanced limiting in the nanosecond excitation regime. An advantageous feature of ferrofluids in terms of device applications is that their optical properties are controllable by an external magnetic field.

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“…In ionic ferrofluids [10,11], nanoparticles are electrically charged to keep the colloidal system stable. Magnetic particles (usually maghemite, γ-Fe 2 O 3 , and different ferrites, MFe 2 O 4 , where M = Mn, Co, Zn, Cu, Ni) are obtained through a chemical precipitation method, and an acid-alkaline reaction between particles and the bulk keeps the surface of them electrically charged [12,13].…”

Section: B Ionic Ferrofluidsmentioning

confidence: 99%

Ferrofluids: properties and applications

Scherer¹,

2005

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Magnetic fluids may be classified as ferrofluids (FF), which are colloidal suspensions of very fine (∼ 10 nm) magnetic particles, and magnetorheological fluids, which are suspensions of larger, usually non-stable, magnetic particles. We review the general classification and the main properties of FF, some theoretical models and a few applications. We consider the stability of a FF in terms of various forces and torques on the magnetic particles. We discuss thermodiffusion, which is an important phenomenon in FF, and which gives rise to the Soret effect. We also consider the rotational dynamics of the magnetic moments of the particles. A large portion of this review is dedicated to applications of FF, including a few of the many technological applications. Among the uses of a FF in the study of materials, we have selected the doping of liquid crystals. Among the very promising uses in Medicine, we discuss drug targeting, hyperthermia, cell separation, and contrast in magnetic resonance imaging. We also make some comments on directions for future research on the properties of ferrofluids.

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Static magneto optical birefringence of new Electric Double Layered Magnetic Fluids

Cited by 11 publications

References 11 publications

ZnFe2O4 nanoparticles for ferrofluids: A combined XANES and XRD study

ZnFe2O4 nanoparticles for ferrofluids: A combined XANES and XRD study

An optical limiter based on ferrofluids

Ferrofluids: properties and applications

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