Estimating the heating of complex nanoparticle aggregates for magnetic hyperthermia

Ortega-Julia, Javier; Ortega, Daniel; Leliaert, Jonathan

doi:10.1039/d3nr01269g

Cited by 6 publications

(4 citation statements)

References 57 publications

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“…Since the interactions are most important for these clusters, even the presence of a small fraction of them could significantly influence the global heating behavior of the assembly, as reported elsewhere. 61 The results of a study about the heating properties of small NP clusters by Ortega-Julia et al 62 also indicate this fact.…”

Section: Interaction Effectsmentioning

confidence: 80%

Understanding magnetic hyperthermia performance within the “Brezovich criterion”: beyond the uniaxial anisotropy description

Faílde,

Ocampo-Zalvide,

Serantes

et al. 2024

Nanoscale

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Section: Interaction Effectsmentioning

confidence: 80%

Understanding magnetic hyperthermia performance within the “Brezovich criterion”: beyond the uniaxial anisotropy description

Faílde,

Ocampo-Zalvide,

Serantes

et al. 2024

Nanoscale

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“…B ext is a uniform applied field and the other component fields are given in Eqs. (1), ( 12), (16), and (20). We emphasize that only B dip and B ext are actual magnetic fields governed by Maxwells equations.…”

Section: E Full Langevin Dynamicsmentioning

confidence: 99%

“…Analytical models for the magnetic response of an MNP ensemble do exist [10,11], but they generally assume spatial homogeneity, linear response, and quasiequilibrium. However, recent studies have highlighted the importance of the local temperature profile [12], MNP interactions [13][14][15][16], nonequilibrium dynamics [17], and aggregation [18,19] in addition to coupling between magnetic and mechanical degrees of freedom [20,21].…”

Section: Introductionmentioning

confidence: 99%

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Conservation laws for interacting magnetic nanoparticles at finite temperature

Durhuus,

Beleggia,

Frandsen

2024

Phys. Rev. B

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We establish a general Langevin dynamics model of interacting, single-domain magnetic nanoparticles (MNPs) in liquid suspension at finite temperature. The model couples the Landau-Lifshitz-Gilbert equation for the moment dynamics with the mechanical rotation and translation of the particles. Within this model, we derive expressions for the instantaneous transfer of energy, linear, and angular momentum between the particles and with the environment. We demonstrate by numerical tests that all conserved quantities are fully accounted for, thus validating the model and the transfer expressions. The energy transfer expressions derived here are also useful analysis tools to decompose the instantaneous, nonequilibrium power loss at each MNP into different loss channels. To demonstrate the model capabilities, we analyze simulations of MNP collisions and high-frequency hysteresis in terms of power and energy contributions.

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Multifunctional Polymer Composites for Automatable Induction Heating with Subsequent Temperature Verification

Reichstein,

Raczka,

Stauch

et al. 2024

Adv Eng Mater

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Manipulating ferromagnetic particles using an alternating current (AC) magnetic field is a versatile method for quick, local, and on‐demand heat generation. These particles can be incorporated into various matrices as heating elements. Their heat release can be controlled by adjusting process or material parameters. Herein, a proof‐of‐concept for a flexible polymer composite with customizable magnetically triggered heat release due to prior object identification via fluorescence readout is presented. The maximum temperature resulting from this process can be determined through a second fluorescence readout ex post. This novel combination of functionalities results from the synergistic interaction of inductively heatable magnetic supraparticles (SPs) and luminescent communicating SPs in one polydimethylsiloxane composite. The surface of the composite can be heated to the maximum temperatures of choice in a range between 125 and 200 °C within 2 s. Heat release and temperature verification provide spatial resolution of millimeters. The identification signature and the working range of the temperature indication functionality of the composite are customizable by exploiting its modular material design. The temperature indication functionality of the composite offers spatial resolution and ex‐post readout at any point of interest, making it a versatile alternative to established optical thermometry methods.

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Estimating the heating of complex nanoparticle aggregates for magnetic hyperthermia

Abstract: Understanding and predicting the heat released by magnetic nanoparticles is central to magnetic hyperthermia treatment planning. In most cases, nanoparticles form aggregates when injected in living tissues, thereby altering their...

Cited by 6 publications

References 57 publications

Understanding magnetic hyperthermia performance within the “Brezovich criterion”: beyond the uniaxial anisotropy description

Understanding magnetic hyperthermia performance within the “Brezovich criterion”: beyond the uniaxial anisotropy description

Conservation laws for interacting magnetic nanoparticles at finite temperature

Multifunctional Polymer Composites for Automatable Induction Heating with Subsequent Temperature Verification

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