Size-dependent magnetic and magnetothermal properties of gadolinium silicide nanoparticles

Nauman, Muhammad; Alnasir, M. Hisham; Hamayun, Muhammad Asif; Wang, Yixu; Shatruk, Michael; Manzoor, Salman

doi:10.1039/d0ra05394e

Cited by 14 publications

(9 citation statements)

References 34 publications

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“…Regarding nanostructures without the surface coating, the Gd 5 Si 4 in its way has a

near the therapeutic range that can be tuned so the heating would be self-regulated [ 1 ]. However, although Si-based materials are potentially biocompatible, the system cytotoxicity has not yet been evaluated [ 1 , 36 ]. As for the La 0.75 Sr 0.25 MnO 3 nanoparticles, they present low toxicity, biocompatibility, and a high SAR value; however, they also tend to aggregate [ 11 ].…”

Section: Resultsmentioning

confidence: 99%

Understanding the Dependence of Nanoparticles Magnetothermal Properties on Their Size for Hyperthermia Applications: A Case Study for La-Sr Manganites

et al. 2021

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Magnetic oxides are promising materials for alternative health diagnoses and treatments. The aim of this work is to understand the dependence of the heating power with the nanoparticle (NP) mean size, for the manganite composition La0.75Sr0.25MnO3 (LSMO)—the one with maximum critical temperature for the whole La/Sr ratio of the series. We have prepared four different samples, each one annealed at different temperatures, in order to produce different mean NP sizes, ranging from 26 nm up to 106 nm. Magnetization measurements revealed a FC-ZFC irreversibility and from the coercive field as function of temperature we determined the blocking temperature. A phase diagram was delivered as a function of the NP mean size and, based on this, the heating mechanism understood. Small NPs (26 nm) is heated up within the paramagnetic range of temperature (T>Tc), and therefore provide low heating efficiency; while bigger NPs are heated up, from room temperature, within the magnetically blocked range of temperature (T<TB), and also provide a small heating efficiency. The main finding of this article is related with the heating process for NPs within the magnetically unblocked range of temperature (Tc>T>TB), for intermediate mean diameter size of 37 nm, with maximum efficiency of heat transfer.

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“…Regarding nanostructures without the surface coating, the Gd 5 Si 4 in its way has a

Section: Resultsmentioning

confidence: 99%

Understanding the Dependence of Nanoparticles Magnetothermal Properties on Their Size for Hyperthermia Applications: A Case Study for La-Sr Manganites

et al. 2021

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“…Cobalt ferrite nanoparticles (13.56 nm) were also heated by a field of 9.4 kA/m at 198 kHz and gave an SAR value of 82.6 W/g [8]. Another study on 35 nm manganese ferrite nanoparticles of concentration 3 mg/mL at a field intensity of 350 G and a frequency of 765.95 kHz showed that the particles gave an SAR value of 70 W/g [74], while Muhammad Nauman et al studied gadolinium silicide nanoparticles and calculated an SAR value of 3.7 W/g for 43 nm particles at a field of 171 Oe and a frequency of 327 kHz [75]. Finally, a recent study using nanoparticles of different diameters based on La-Sr manganites, and with a low Curie temperature, gave SAR values ranging from 5.6 to 30 W/g [70].…”

Section: Assessment Of Sarmentioning

confidence: 99%

Magnetic Properties and SAR for Gadolinium-Doped Iron Oxide Nanoparticles Prepared by Hydrothermal Method

et al. 2021

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This study is an attempt to produce gadolinium-doped iron oxide nanoparticles for the purpose of utilization in magnetic fluid hyperthermia (MFH). Six gadolinium-doped iron oxide samples with varying gadolinium contents ( were prepared using the hydrothermal method and high vapor pressure to incorporate gadolinium ions in the iron oxide structure. The samples were indexed as , with varying from 0.0 to 0.1. The results reveal that gadolinium ions have a low solubility limit in the iron oxide lattice (x = 0.04). The addition of gadolinium caused distortion in the produced maghemite phase and formation of other phases. Based on X-ray diffraction (XRD) analysis and photoelectron spectroscopy (XPS), it was observed that gadolinium mostly crystalized as gadolinium hydroxide, for gadolinium concentrations above the solubility limit. The measured magnetization values are consistent with the formed phases. The saturation magnetization values for all gadolinium-doped samples are lower than the undoped sample. The specific absorption rate (SAR) for the pure iron oxide samples was measured. Sample GdIO/0.04, pure iron oxide doped with gadolinium, showed the highest potential to produce heat at a frequency of 198 kHz. Therefore, the sample is considered to hold great promise as an MFH agent.

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“…Magnetic nanoparticles transform alternate current magnetic field energy into heat by different magnetic loss mechanisms, such as N´eel and Brownian losses. 77 Compared to traditional hyperthermia therapy or NIR laser-based hyperthermia, MTT has advantages of higher penetration ability of magnetic field in the tissues and enhanced accumulation of magnetic nanoparticles in the tumor via magnetic targeting strategy for tumor treatment. It has been reported that MTT could trigger an antitumor immune response mediated by both CD8 + and CD4 + T cells.…”

Section: Magneto-thermal Therapymentioning

confidence: 99%

Nanoparticle-mediated tumor vaccines for personalized therapy: preparing tumor antigensin vivoorex vivo?

Li²,

Song³

et al. 2021

J. Mater. Chem. B

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Size-dependent magnetic and magnetothermal properties of gadolinium silicide nanoparticles

Abstract: Gadolinium silicide (Gd5Si4) nanoparticles prepared by surfactant-assisted ball milling exhibit a size-dependent reduction in magnetic ordering temperature and a high magnetothermal effect making them suitable for magnetic hyperthermia applications.

Cited by 14 publications

References 34 publications

Understanding the Dependence of Nanoparticles Magnetothermal Properties on Their Size for Hyperthermia Applications: A Case Study for La-Sr Manganites

Understanding the Dependence of Nanoparticles Magnetothermal Properties on Their Size for Hyperthermia Applications: A Case Study for La-Sr Manganites

Magnetic Properties and SAR for Gadolinium-Doped Iron Oxide Nanoparticles Prepared by Hydrothermal Method

Nanoparticle-mediated tumor vaccines for personalized therapy: preparing tumor antigensin vivoorex vivo?

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