Size-dependent magnetic and magnetothermal properties of gadolinium silicide nanoparticles

Nauman M, Alnasir MH, Hamayun MA, Wang Y, Shatruk M, Manzoor S. 2020. Size-dependent magnetic and magnetothermal properties of gadolinium silicide nanoparticles. RSC Advances. 10(47), 28383–28389.


Journal Article | Published | English
Author
Nauman, MuhammadIST Austria ; Alnasir, Muhammad Hisham; Hamayun, Muhammad Asif; Wang, YiXu; Shatruk, Michael; Manzoor, Sadia
Abstract
Gadolinium silicide (Gd5Si4) nanoparticles are an interesting class of materials due to their high magnetization, low Curie temperature, low toxicity in biological environments and their multifunctional properties. We report the magnetic and magnetothermal properties of gadolinium silicide (Gd5Si4) nanoparticles prepared by surfactant-assisted ball milling of arc melted bulk ingots of the compound. Using different milling times and speeds, a wide range of crystallite sizes (13–43 nm) could be produced and a reduction in Curie temperature (TC) from 340 K to 317 K was achieved, making these nanoparticles suitable for self-controlled magnetic hyperthermia applications. The magnetothermal effect was measured in applied AC magnetic fields of amplitude 164–239 Oe and frequencies 163–519 kHz. All particles showed magnetic heating with a strong dependence of the specific absorption rate (SAR) on the average crystallite size. The highest SAR of 3.7 W g−1 was measured for 43 nm sized nanoparticles of Gd5Si4. The high SAR and low TC, (within the therapeutic range for magnetothermal therapy) makes the Gd5Si4 behave like self-regulating heat switches that would be suitable for self-controlled magnetic hyperthermia applications after biocompatibility and cytotoxicity tests.
Publishing Year
Date Published
2020-07-29
Journal Title
RSC Advances
Volume
10
Issue
47
Page
28383-28389
ISSN
IST-REx-ID

Cite this

Nauman M, Alnasir MH, Hamayun MA, Wang Y, Shatruk M, Manzoor S. Size-dependent magnetic and magnetothermal properties of gadolinium silicide nanoparticles. RSC Advances. 2020;10(47):28383-28389. doi:10.1039/d0ra05394e
Nauman, M., Alnasir, M. H., Hamayun, M. A., Wang, Y., Shatruk, M., & Manzoor, S. (2020). Size-dependent magnetic and magnetothermal properties of gadolinium silicide nanoparticles. RSC Advances. Royal Society of Chemistry. https://doi.org/10.1039/d0ra05394e
Nauman, Muhammad, Muhammad Hisham Alnasir, Muhammad Asif Hamayun, YiXu Wang, Michael Shatruk, and Sadia Manzoor. “Size-Dependent Magnetic and Magnetothermal Properties of Gadolinium Silicide Nanoparticles.” RSC Advances. Royal Society of Chemistry, 2020. https://doi.org/10.1039/d0ra05394e.
M. Nauman, M. H. Alnasir, M. A. Hamayun, Y. Wang, M. Shatruk, and S. Manzoor, “Size-dependent magnetic and magnetothermal properties of gadolinium silicide nanoparticles,” RSC Advances, vol. 10, no. 47. Royal Society of Chemistry, pp. 28383–28389, 2020.
Nauman M, Alnasir MH, Hamayun MA, Wang Y, Shatruk M, Manzoor S. 2020. Size-dependent magnetic and magnetothermal properties of gadolinium silicide nanoparticles. RSC Advances. 10(47), 28383–28389.
Nauman, Muhammad, et al. “Size-Dependent Magnetic and Magnetothermal Properties of Gadolinium Silicide Nanoparticles.” RSC Advances, vol. 10, no. 47, Royal Society of Chemistry, 2020, pp. 28383–89, doi:10.1039/d0ra05394e.
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