Dynamics of magnetic nanoparticle suspensions

Singh, Vanchna; Banerjee, Varsha; Sharma, Manish

doi:10.1088/0022-3727/42/24/245006

Cited by 43 publications

(37 citation statements)

References 35 publications

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“…The macroscopic magnetic properties of the MF are determined by the orientation of magnetic moments of nano-particles in the external magnetic field. An externally applied magnetic field induces ordering of the magnetic moments of the particles giving rise to magnetization of the sample as a whole and can cause certain amount of colloidal particles to join into quasispherical formations and clusters as long as hundreds of nanometers or more [11]. There are also computer simulations investigating an aggregation phenomena in a polydisperse colloidal dispersion of ferromagnetic nanoparticles [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Structure of transformer oil-based magnetic fluids studied using acoustic spectroscopy

Kúdelčík

Bury

Drga

et al. 2013

Journal of Magnetism and Magnetic Materials

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Section: Introductionmentioning

confidence: 99%

Structure of transformer oil-based magnetic fluids studied using acoustic spectroscopy

Kúdelčík

Bury

Drga

et al. 2013

Journal of Magnetism and Magnetic Materials

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“…Since SAR value is strongly depend on H C , so SAR value also changes with size of the nanoparticles. So, for a very fine small particle hysteresis contribution to heat dissipation is very small [12]. Mainly, in nanoscale range relaxation loss is alone responsible over the other two mechanisms for heat generation process of MNPs.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Killing the Tumor Cells by Meghamite Nanoparticles

Das¹

2017

IJRASET

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From the last decade due to the immense development in the field of Nano-science, magnetic nanoparticles hyperthermia has been proved as one of the most reliable new tumor treatment therapy. Because of immature cells, low blood flow rate, high density and lack of oxygen environment inside the tumour, it is experimentally seen that, tumour cells at temperature between 42°C and 47°C the viability of the cancerous cells is reduced [5,14]). In order to achieve efficient and safe operational hyperthermia conditions, it is necessary to study or investigate detail about what heating model or magnetic loss processes dominant over the other in the ensemble of nanoparticles which are injected at the cancerous tumour sites. Because there are more than one heat loss process involved in generating heat by MNPs. There have numerous both theoretical and experimental work been done by different nanoparticles. Here, in this work we consider different MNPs and compare their theoretical results given by these particles. And taking into account cellular uptake mechanism since hyperthermia is intercellular process it is seen that Meghamite is the best magnetic particle to use for the hyperthermia. Using the data for meghamite we plot heat dissipation profile for different time interval inside the tumor. Comparing this result with normal tissue we have showed that hyperthermia has very low side effect on normal or healthy tissue. And at around 40 minutes it will raise the temperature of the tumor to 47 0 C, which is required for killing the tumour cell.

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“…14) Uð" rÞ is approximately calculated by using Eq. (1), which critically accounts for the magnetopotential energy U m .…”

Section: Ion Concentration-dependent Electrostatic Interparticle Intementioning

confidence: 99%

Dipolar magnetism and electrostatic repulsion of colloidal interacting nanoparticle system

Trisnanto

Yasuda

Kitamoto

2018

Jpn. J. Appl. Phys.

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Thermally activated Brownian kinetics of magnetic nanoparticles in water potentially results in particle aggregation, owing to magnetic and electrostatic interparticle interactions. To determine the significance of those competing interactions in changing the equilibrium hydrodynamic particle volume, we examined the mean distance between polydispersed particles as an important factor for initiating a secondary particle clustering among individually dispersed particles or their primary cluster structures. We particularly characterized the magnetic properties of a superparamagnetic ferrofluid in different ionic environments and at different particle (mass) concentrations. Regarding the concentration of ionic components added to dense ferrofluid samples, the spectral relaxation shift and the reduction in magnetic susceptibility were attributed to different hydrodynamic polydispersities of aggregates. However, no substantial changes in complex susceptibility with increasing ion concentration in dilute ferrofluid samples were confirmed, which indicates relatively stable dipolar-interactions. Regarding the adjustment of particle concentration, we found that the changes in the effective relaxation time constant are proportionally associated with the magnetopotential energy of a given oscillatory magnetic field.

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Dynamics of magnetic nanoparticle suspensions

Cited by 43 publications

References 35 publications

Structure of transformer oil-based magnetic fluids studied using acoustic spectroscopy

Structure of transformer oil-based magnetic fluids studied using acoustic spectroscopy

Killing the Tumor Cells by Meghamite Nanoparticles

Dipolar magnetism and electrostatic repulsion of colloidal interacting nanoparticle system

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