Role of Anisotropy, Frequency, and Interactions in Magnetic Hyperthermia Applications: Noninteracting Nanoparticles and Linear Chain Arrangements

2021 ◽  
Vol 15 (4) ◽  
Author(s):  
Daniela Paola Valdés ◽  
Enio Lima, ◽  
Roberto Daniel Zysler ◽  
Gerardo Fabián Goya ◽  
Emilio De Biasi
Nanoscale ◽  
2015 ◽  
Vol 7 (17) ◽  
pp. 7717-7725 ◽  
Author(s):  
M. Campanini ◽  
R. Ciprian ◽  
E. Bedogni ◽  
A. Mega ◽  
V. Chiesi ◽  
...  

Left: morphological and magnetic characterization of magnetite NPs. Right: Lorentz microscopy unveils the role of dipolar interactions in magnetic hyperthermia of superparamagnetic NPs.


2000 ◽  
Vol 640 ◽  
Author(s):  
E. F. Bezerra ◽  
A. G. Souza Filho ◽  
J. Mendes Filho ◽  
V. Lemos ◽  
V. N. Freire ◽  
...  

ABSTRACTTheoretical calculations are performed on the role of smooth interfaces in the Raman spectra of Si/3C-SiC superlattices. The dispersion relations were obtained using a linear chain model with the alloyed interface δ-(3C-SiC)0.5(Si)0.5 described in the virtual crystal approximation. A modified bond-polarizability model was used to calculate the Raman spectra. The main results are the enhancement of the Raman spectra and the appearance of new peaks in between those related to the Si quasi confined and the 3C-SiC-confined modes with increasing number δ?of interfacial monolayers (3C-SiC)0.5(Si)0.5. Some of the smooth interface related Raman peaks have intensity comparable with those of an abrupt Si/3C-SiC superlattice.


Author(s):  
Andrey Yu. Zubarev

This paper deals with a theoretical study of the effect of chain-like aggregates on magnetic hyperthermia in systems of single-domain ferromagnetic particles immobilized in a non-magnetic medium. We assume that the particles form linear chain-like aggregates and the characteristic time of the Néel remagnetization is much longer than the time of medium heating (time of process observation). This is applicable to magnetite particles when the particle diameter exceeds 20–25 nm. Our results show that the appearance of the chains significantly decreases the intensity of heat production. This article is part of the theme issue ‘Heterogeneous materials: metastable and non-ergodic internal structures’.


2017 ◽  
Vol 17 (5) ◽  
pp. 2323-2332 ◽  
Author(s):  
Ilona S. Smolkova ◽  
Natalia E. Kazantseva ◽  
Vladimir Babayan ◽  
Jarmila Vilcakova ◽  
Nadezda Pizurova ◽  
...  

2021 ◽  
Vol 3 ◽  
Author(s):  
Tiê Menezes Oliveira ◽  
Fernanda Costa Brandão Berti ◽  
Sidney Carlos Gasoto ◽  
Bertoldo Schneider ◽  
Marco Augusto Stimamiglio ◽  
...  

The use of biomaterials in medicine is not recent, and in the last few decades, the research and development of biocompatible materials had emerged. Hydroxyapatite (HAp), a calcium phosphate that constitutes a large part of the inorganic composition of human bones and teeth, has been used as an interesting bioceramic material. Among its applications, HAp has been used to carry antitumor drugs, such as doxorubicin, cisplatin, and gemcitabine. Such HAp-based composites have an essential role in anticancer drug delivery systems, including the treatment of osteosarcoma. In addition, the association of this bioceramic with magnetic nanoparticles (MNPs) has also been used as an effective agent of local magnetic hyperthermia. Further, the combined approach of the aforementioned techniques (HAp scaffolds combined with anti-tumor drugs and MNPs) is also an attractive therapeutical alternative. Considering the promising role of the use of bioceramics in modern medicine, we proposed this review, presenting an updated perspective on the use of HAp in the treatment of cancer, especially osteosarcoma. Finally, after giving the current progress in this field, we highlight the urgent need for efforts to provide a better understanding of their potential applications.


2017 ◽  
Vol 5 (24) ◽  
pp. 4587-4594 ◽  
Author(s):  
P. Guardia ◽  
S. Nitti ◽  
M. E. Materia ◽  
G. Pugliese ◽  
N. Yaacoub ◽  
...  

To produce Au–FexOy dimers with outstanding heating performances under clinical magnetic hyperthermia conditions, here we report two synthesis routes, a two-pot and a one-pot method.


Nanoscale ◽  
2015 ◽  
Vol 7 (5) ◽  
pp. 1768-1775 ◽  
Author(s):  
C. Blanco-Andujar ◽  
D. Ortega ◽  
P. Southern ◽  
Q. A. Pankhurst ◽  
N. T. K. Thanh

Controlled synthesis of multicore magnetic nanoparticles reveals that optimum heating is obtained when the cores are comparatively large and few, minimising the core–core interactions that inhibit hyperthermia.


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