Investigation of ferrofluid nanostructure by laser light scattering: medical applications

Nepomnyashchaya, Elina; Velichko, Elena; Плешаков, И. В.; Aksenov, E. T.; Savchenko, Ekaterina

doi:10.1088/1742-6596/841/1/012020

Cited by 22 publications

(4 citation statements)

References 5 publications

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“…The ferrofluid's superparamagnetism and miniaturisation properties have attracted significant concern and attention in research endeavours and published papers during the last few decades [26][27][28][29][30]. It has been extensively researched for electromagnetic engineering [31][32][33][34], mechanical engineering [35,36], and medical uses [37,38]. For example, ferrofluid has been applied to reduce the friction in mechanical and aerospace applications [35,39], seal liquids in electrical devices [40,41], target magnetic medication and conduct magnetic hyperthermia [42,43].…”

Section: Ferrofluid Micro-valvesmentioning

confidence: 99%

Wearable Bio-Inspired Pulsating-Flow Cooling for Live Garments Based on a Novel Design of Ferrofluid Micro-Valve

Tang

Luk

2022

Energies

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Temperature-related frustrations, such as heat exhaustion, heat stroke, hypothermia, and frost damage, are some of the most prevalent health risks encountered by humans. The aggravation may be lethal for individuals who reside or work in conditions of protracted and high temperature. Temperature-control technologies, such as underfloor heating and air conditioners, have been studied and applied to give individuals with a pleasant and, more crucially, an endurable temperature. However, it may be challenging to install these technologies in an exterior or enclosed space. In addition, they are inflexible for individual requirements, such as mobility and personal-temperature management. A wearable bio-inspired pulsing-flow (discontinuous) cooling system, which can significantly enhance cooling performance, is proposed in this work. The proposed system is implemented with valves to generate pulsating flows. Given that traditional mechanical-valve actuation systems continue to face limits in terms of switching frequency, interface wear loss, and size limitations for wearable-garment applications, a ferrofluid-based shape-controllable micro-valve is proposed to reduce the size and weight of the cooling system. An empirical approach is adopted to avoid the extensive computational simulation of the thermo fluidic dynamics involved, so that efforts can be focused on the design of an innovative scaled prototype built from ferrofluid valves positioned in a specific array of the cooling tubes. This allows the performance of continuous and pulsating cooling-flow systems to be compared on the same flow rate baseline. The results demonstrate that the proposed technology not only delivers superior cooling efficiency, but also has the potential to provide individualized temperature regulation in a “live” garment.

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Section: Ferrofluid Micro-valvesmentioning

confidence: 99%

Wearable Bio-Inspired Pulsating-Flow Cooling for Live Garments Based on a Novel Design of Ferrofluid Micro-Valve

Tang

Luk

2022

Energies

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“…FF itself has been intensively studied for a long time as a unique system that combines magnetic properties with fluidity [1]. In the last decade, the interest has been increased due to the new proposals that have appeared for the FF application in basic research [2][3][4], biomedicine [5][6], and also, what is important for us, in photonic devices [7][8]. The number and variety of the latter applications are quite large, here we will give some illustrative examples only.…”

Section: Introductionmentioning

confidence: 99%

Ferrofluidic sensitive element in fiber optics

Плешаков

Agruzov

2021

Supl. Rev. Mex. Fis.

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This article discusses problems related to the use of ferrofluid, infiltrated in a microstructured optical fiber and controlled by an external magnetic field. It summarizes the results obtained by the authors on a fiber filled with this substance and subjected to harmonic or impulse field action. It is shown that magneto-optical effects are observed here, which significant for designing tunable fiber elements.

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“…[26] for a review and, e.g., Refs. [27][28][29][30]). Among them, from the viewpoint of Casimir effect, the applications of greatest interest are to micromechanical sensors [31], microfluidics [32,33] and microrobotics [34], where ferrofluids may be confined between two closely spaced surfaces, forming the three-layer system.…”

Section: Introductionmentioning

confidence: 99%

Impact of magnetic nanoparticles on the Casimir pressure in three-layer systems

2019

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The Casimir pressure is investigated in three-layer systems where the intervening stratum possesses magnetic properties. This subject is gaining in importance in connection with ferrofluids and their use in various microelectromechanical devices. We present general formalism of the Lifshitz theory adapted to the case of ferrofluid sandwiched between two dielectric walls. The Casimir pressure is computed for the cases of kerosene-and water-based ferrofluids containing a 5% fraction of magnetite nanoparticles with different diameters between silica glass walls. For this purpose, we have found the dielectric permittivities of magnetite and kerosene along the imaginary frequency axis employing the available optical data and used the familiar dielectric properties of silica glass and water, as well as the magnetic properties of magnetite. We have also computed the relative difference in the magnitudes of the Casimir pressure which arises on addition of magnetite nanoparticles to pure carrier liquids. It is shown that for nanoparticles of 20 nm diameter at 2 micrometer separation between the walls this relative difference exceeds 140% and 25% for kerosene-and water-based ferrofluids, respectively. An interesting effect is found that at a fixed separation between the walls an addition of magnetite nanoparticles with some definite diameter makes no impact on the Casimir pressure. The physical explanation for this effect is provided.Possible applications of the obtained results are discussed.

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Investigation of ferrofluid nanostructure by laser light scattering: medical applications

Cited by 22 publications

References 5 publications

Wearable Bio-Inspired Pulsating-Flow Cooling for Live Garments Based on a Novel Design of Ferrofluid Micro-Valve

Wearable Bio-Inspired Pulsating-Flow Cooling for Live Garments Based on a Novel Design of Ferrofluid Micro-Valve

Ferrofluidic sensitive element in fiber optics

Impact of magnetic nanoparticles on the Casimir pressure in three-layer systems

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