Muhammad, Elijah

Mamiya, Lawrence H.

doi:10.1093/acref/9780195301731.013.34604

Cited by 3 publications

(5 citation statements)

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“…The different methods for calculating AC hysteresis loops and their areas have been thoroughly described [99,110] and analytical expressions have been proposed. Mamiya reviewed the theoretical criteria to choose the proper field intensity and frequency that maximize the power losses and hence increase the heat release by MNPs [110]. In blocked MNPs, H 0 has to be adjusted above the anisotropy field (H K ) value of the system, given by ( )…”

Section: -Modeling Heat Dissipation In Mnpsmentioning

confidence: 99%

Section: -Current Trends: Modeling Interparticle Interactionsmentioning

confidence: 99%

“…These findings imply that (i) Brownian relaxation is of little relevance in the therapeutic practice, and (ii) the role of interparticle magnetic interactions in heat generation cannot be neglected. Consequently, assuming that MNPs are magnetically isolated from each other upon intratumoral injection[110] may lead to deviations in simulated models. Kinetic Monte Carlo methods are becoming more popular for computational models of magnetic heating considering interparticle interactions, as they incorporate the time dimension of the considered system.…”

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confidence: 99%

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Fundamentals and advances in magnetic hyperthermia

Périgo

Hemery

Sandre

et al. 2015

Applied Physics Reviews

703

526

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Nowadays, magnetic hyperthermia constitutes a complementary approach to cancer treatment. The use of magnetic particles as heating mediators, proposed in the 1950s, provides a novel strategy for improving tumor treatment and, consequently, patient quality of life. This review reports a broad overview about several aspects of magnetic hyperthermia addressing new perspectives and the progress on relevant features such as the ad hoc preparation of magnetic nanoparticles, physical modeling of magnetic heating, methods to determine the heat dissipation power of magnetic colloids including the development of experimental apparatus and the influence of biological matrices on the heating efficiency.Comment: 104 pages, 28 figures. Manuscript accepted for publication in Applied Physics Review

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Section: -Modeling Heat Dissipation In Mnpsmentioning

confidence: 99%

Section: -Current Trends: Modeling Interparticle Interactionsmentioning

confidence: 99%

mentioning

confidence: 99%

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Fundamentals and advances in magnetic hyperthermia

Périgo

Hemery

Sandre

et al. 2015

Applied Physics Reviews

703

526

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“…Hence, the specific loss power (SLP, a figure of merit of hyperthermia) of nanoparticles depends on material, size, composition and the frequency and intensity of the applied magnetic field [446][447][448]. Since heat dissipation depends on intrinsic material parameters such as K u and M S , the combination of two phases in a core/shell structure can be advantageous to enhance the response of the material to the ac-fields, as shown by theoretical calculations [449,450]. Experimentally, it has been demonstrated that the combination of different magnetic soft/hard or hard/soft ferrite core/shell particles (e.g., MnFe 2 O 4 /CoFe 2 O 4 or CoFe 2 O 4 /MnFe 2 O 4 ) leads enhanced SLP values compared to single phase ferrite particles (see Fig.…”

Section: Biomedical Applicationsmentioning

confidence: 99%

Applications of exchange coupled bi-magnetic hard/soft and soft/hard magnetic core/shell nanoparticles

et al. 2015

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A B S T R A C TThe applications of exchange coupled bi-magnetic hard/soft and soft/hard ferromagnetic core/shell nanoparticles are reviewed. After a brief description of the main synthesis approaches and the core/shell structural-morphological characterization, the basic static and dynamic magnetic properties are presented. Five different types of prospective applications, based on diverse patents and research articles, are described: permanent magnets, recording media, microwave absorption, biomedical applications and other applications. Both the advantages of the core/shell morphology and some of the remaining challenges are discussed.

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“…Magnetic nanoparticles have been used in many important technological applications such as ultra-high density magnetic recording and data storage, highly sensitive magnetic sensors and permanent magnets. Recently, magnetic nanoparticles (MNPs) have been attracting attention in both nanomedicine and biology for theranostic applications [1][2][3][4][5] including magnetic separation of biological entities, therapeutic drug delivery, magnetic hyperthermia for tumour therapy, contrast agents for magnetic resonance imaging (MRI) [6][7][8] and markers in magnetic particle imaging (MPI). [9][10][11][12] In particular magnetic particle hyperthermia is a promising cancer treatment technique.…”

Section: Introductionmentioning

confidence: 99%

Susceptibility losses in heating of magnetic core/shell nanoparticles for hyperthermia: a Monte Carlo study of shape and size effects

2015

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Optimizing the heating properties of magnetic nanoparticles is of great importance for hyperthermia applications. Recent experimental results show that core/shell nanoparticles could give an increased specific absorption rate (SAR) compared to the magnetic oxide nanoparticles currently used. We have developed a modified phenomenological model based on the linear Néel-Brown relaxation model to calculate the SAR due to susceptibility losses in complex nanoparticles with ferromagnetic (FM) core/ferrimagnetic (FiM) shell morphology. We use the Monte Carlo (MC) simulation technique with the implementation of the Metropolis algorithm to investigate the effect of size and shape on the magnetisation behaviour of complex ferromagnetic/ferrimagnetic nanoparticles covered by a surfactant layer. The findings of our simulations are used as an input in our modified model for the calculation of the SAR. Our calculations show that for all the sizes and shapes the complex FM/FiM nanoparticles give higher SAR values than the pure ferrimagnetic ones due to their higher core saturation magnetisation. For all sizes the nanoparticles with the truncated cuboctahedral shape give the highest SAR values and the cubic ones the lowest ones. The decrease in the surfactant thickness results in an increase of the SAR values. Our results have the same characteristics as the available experimental data from Fe/Fe3O4 nanoparticles, confirming that the complex nanoparticles with core/shell morphology can optimise the heating properties for hyperthermia.

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Muhammad, Elijah

Cited by 3 publications

References 0 publications

Fundamentals and advances in magnetic hyperthermia

Fundamentals and advances in magnetic hyperthermia

Applications of exchange coupled bi-magnetic hard/soft and soft/hard magnetic core/shell nanoparticles

Susceptibility losses in heating of magnetic core/shell nanoparticles for hyperthermia: a Monte Carlo study of shape and size effects

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